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If you have an unanswered issue, you can see the following list of questions and answers:

Irrigation Systems 
  • Do you make projects for residential irrigation systems?
    Yes, we do.

    Please contact one of our 8 Irrigation Shops.
  • My irrigation system does not work properly. Can you recover it? What shall I do?
    Yes, we can.

    We indicate a professional installer, who will check in due time the needs and will indicate the necessary corrections to be introduced with the respective estimated costs.

    Please contact one of our 8 Irrigation Shops.
  • What kind of information do you need to make me an offer for a residential irrigation system project?
    • Drawing to scale of your garden indicating existing contructions and garden zones to be irrigated or preferentially a landscape project;
    • Existing declivities in ground (in meters);
    • Existing points of water and its location (well, public water supply);
    • Flow in l/h and pressure in bar in the point of water supply;
    • Electricity point 220 V and its location.

    Can not find answers to your questions? Contact Us!
Water Pumps - Logistics 
  • Are the pumps in your catalogue for immediate delivery?
    Yes, they are usually available for sale at our Irrigation Shops, except in the event of a previous sale.
  • May I request the visit of a technician to the site?
    Yes, if you have doubts as to the right equipment or installation, visit our Irrigation Shop, or contact the commercial technician from your area of residence.

    Can not find answers to your questions? Contact Us!
Water Pumps - Technical Aspects 
  • What is the necessary data to choose a water pump in an efficient way?
    For us to be able to define correctly the electropump model you need, we must know:
    • The maximum functioning flow. This information can be determined by adding the debit of all irrigation emitters (sprinklers, sprayers, drop-by-drop irrigation systems). For systems divided into sectors, it will always be the sector with greater need of water (consumption) that counts.
    • It will also be necessary to know the functioning pressure of the pump. For that it will be necessary to find out the functioning pressure of the irrigation system as well as calculate all load losses along the piping (caused by filters, electrovalves, land inclination, length and dimensions of the piping). The functioning pressure of the electropump will be the added value of the pressure of the irrigation system plus the load losses associated to the system. 
    • Finally it will be necessary to know the type of pump to be installed. Surface pump (for suction from a well or a reservoir) or submersible (for suction from a well or a borehole).
  • How do I calculate the power of the water pump for my watering system?
    The power of a pump depends on 3 factors: pressure, functioning flow and electromechanical output. The pressure and the flow may be analyzed from the level curves of each pump. The output of the electropump depends on the type of pump which is functioning, as well as on the quality of its planning and construction.
  • I want to water my backyard, which is the better pump?
    That depends! Each case is a case! First of all we must consider 2 fundamental types of electropump: surface pumps and submersible pumps. The surface ones are not submerged in the water, while on the contrary, the submersible ones are submerged inside the reservoir (well, tank or borehole) and perform the extraction of water from that reservoir. Surface electropumps are usually limited to the reservoir in the height of water extraction (9 meters maximum).
  • I have a well and need to install a pump. Which is the more adequate?
    In the case of an artesian borehole it will always need a specific pump. It will always be necessary to know the depth at which the pump will function, the operating pressure and the flow. Together with the diameter of the borehole, we are able to define a pump for you in just a few minutes.

    Visit our Irrigation Shops to purchase the right products.
  • Why do I have to apply a pressure controller and a gauge? What are those for?
    The pressure controller is a safety element of the pump and of the installation itself. It guarantees that when the system reaches too high pressures, the pump is switched-off, thus preventing the rupture of other elements.

    The gauge is a pressure reading element which is always useful to check the functioning pressure of the system.
  • Are the pumps self-priming?
    There are self-priming models, in which the pump fills itself with water and stays ready to operate, other pumps may need to be primed manually, meaning that the pump must be filled in manually, being afterwards ready to operate.
  • What should I do in case of malfunction?
    After gathering information on the field about the status of the malfunction in the equipment, visit our Irrigation Shop, where the product was purchased, or contact the commercial technician.

    Can not find answers to your questions? Contact Us!
Water Pumps - Usage 
  • I need to drain waste water, which is the best pump for that purpose?
    We have for sale a range of small drainage pumps for several purposes.

    Visit our Irrigation Shops so that we may quickly identify the most adequate electropump.
  • I have lack of pressure in the domestic network, do I need a pump with a tank or just the pump?
    The domestic network does not allow a private pressurization directly from the network. The solution will always have to include the installation of a tank, only then allowing for the pressurization of the system with an electropump.
  • How do I prime a surface pump?
    Electropumps have an access hole through which the water must be refilled in the pump. When the pump is completely filled with water through that hole, it is then ready to operate.
  • What is an autoclave for?
    An autoclave is a device to regulate the pressure of the pumping system. A pumping system equipped with an autoclave, allows for the management of the pump’s functioning independently from water needs.

    It allows, for example, for the pump to operate both for drop-by-drop irrigation systems (usually with a very low water consumption), as for sprinkler irrigation (high water debit).
    The autoclave always works associated to the pressure controller. When the pressure inside the body of the autoclave becomes too low, the pressure controller acts by switching-on the pump. On the contrary, when the pressure becomes too high, the autoclave calculates that pressure and “triggers” the pressure controller, switching-off the pump. The autoclave is a very important system which prevents the rupture of pipes and other elements, as it prevents high pressures and water hammers. It also allows for energy saving, as the electropump will only operate for some periods of time according to water needs.

    Visit our Irrigation Shops to purchase this type of products.
  • What is a controlmatic for?
    The controlmatic (electronic pressure controller) functions similarly to an autoclave. The main difference resides in the fact that, instead of a pressostatic control as the one obtained with the autoclave, with the controlmatic the functioning is completely electronic. The controlmatic has also the advantage of managing the electrical power absorbed by the pump, as it will vary the functioning speed of the electropump. This system is very useful for systems with a large variation of flows.

    Visit our Irrigation Shops to purchase the right products.
  • The pump in my well stopped working. Does your company repair the pump or do I need to purchase a new one?
    We have for sale substitution parts to repair electropumps (electrical engines, pressure controllers, autoclave membranes, etc).

    In the event of a malfunction, visit our Irrigation Shops so that we may provide you with the most efficient response to your problem.
  • What type of pumps do you sell and what are those used for?
    We have for sale a broad range of electropumps. Other models under consultation. Visit our Irrigation Shops.
    1.    Jet Series Electropump Group
    Suction electropumps, complete with 25 l autoclave, vertical for the Aquajet model or horizontal for the Superjet model.
    9 m Jet Suction electropump.

    2.    Pressure Electropump with 2 Impellers
    Ideal to use with all types of residential irrigation systems, or any other pressurized systems.

    3.    Integrated Electronics Electropump (Domestic Usage)
    Automatic multicellular electropump with 4 and 5 impellers. Very silent (67 db). Water cooled, ideal for places with low ventilation. Electronic safety device which prevents the pump from functioning when dry. Integrated check valve.

    4.    Well Submersible Electropump with Integrated Electronics
    Submersible electropump with integrated electronics, with automatic start and stop. Built-in pressure and flows sensor. Electronic safety device which prevents the pump from functioning when dry. Integrated check valve.

    5.    Drainage Pumps
    Submersible pumps for extraction and/or transportation of water - clean, dirty, and with or without sanitary waste (according to the model to be installed) - where it's not necessary to have pressurization. These may be used in wells, tanks, to remove water from flooded buildings, among other different usages.

    6.    Well Pumps
    Submersible pumps for water collection from wells, reservoirs or tanks, where the network must be pressurized.

    7.    Well Pumps Ecologic Model
    Submersible pumps for water collection from wells, reservoirs or tanks, where the network must be pressurized. Ecologic model, given the absence of oil in the internal circuit of the engine, thus avoiding water contamination in case of malfunction.

    8.    Autoclaves
    Working as a water reserve for the circuit, avoiding the wearing caused by the starting and stopping of a pump.
    Can not find answers to your questions? Contact Us!
Swimming-pools - Water 
  • How do I calculate the water capacity of my swimming-pool?
    Before initiating any treatment in the swimming-pool, you must know its capacity (volume). This way, you may calculate the exact dosages of the chemicals you will have to add to the water as follows:
    1 ppm <=> 1 mg/l <=> 1 g/m3
    1.    Circular Swimming-pool Volume (m3) = Lenght (m) x Width (m) x Average Depth (m) x 0,78
    2.    Rectangular or Square Swimming-pool Volume (m3) = Length (m) x Width (m) x Average Depth (m)

    3.    Oval Swimming-pool Volume (m3) = Lenght (m) x Width (m) x Average Depth (m) x 0,89
  • What is water’s pH - how to measure and adjust it
    Water’s pH
    Water's pH is a concept used to express its degree of acidity or basicity. There's a pH scale which goes from 0 to 14 units.
    1.    pH = 7 - corresponds to neutral water

    2.    pH < 7 - corresponds to acidic water

    3.    pH > 7 - corresponds to basic water

    Ideal pH for swimming-pool water
    In order to have a good swimming-pool’s water disinfection, it’s necessary to have an adjusted pH value between 7,2 and 7,6 units. Between these two pH values there’s a good disinfection of the water and the well-being of the bathers is favored. An inadequate pH value leads to a greater disinfectants consumption, water turbidity, irritation of bathers’ eyes and mucosa, and may even be harmful to our health.

    How to measure the pH value of the swimming-pool’s water
    For water measurement and analysis, an analysis kit for pH levels, free chlorine and total alkali. With one single dip the straps indicate the results for your swimming-pool’s water.  

    The importance of having an adjusted pH between 7,2 and 7,6 units
    Chlorine will only perform an adequate disinfection if the water's pH in your swimming-pool is adjusted between 7,2 and 7,6. A misadjusted value may be harmful to your health.

    What to do if the water in my swimming-pool has a pH value inferior or superior to the values of 7,2 and 7,6 units respectively
    Should the value be inferior to 7,2 units you must add a pH increaser product. Should the value be superior to 7,6 units you must add a pH decreaser product to adjust the value.
    Visit our Irrigation Shops to purchase this type of products.
  • What is the total alkali of the water?
    Total alkali is water’s capacity to resist a pH change. If the total alkali is low, the pH will oscillate and be difficult to maintain. When the total alkali is high, the pH may be difficult to change and we may find formation of argol in the water and lime deposits on the surfaces.

    The ideal alkali value must be between 80 and 120 ppm.
  • How often should I measure the alkalinity of my swimming-pool’s water?
    For swimming-pools with a large concentration of people, it’s best to measure every fifteen days, when water is changed or when there’s heavy raining. For domestic swimming-pools it should be done every month.
    Can not find answers to your questions? Contact Us!
Swimming-pools - Water Treatment 
  • What types of swimming-pool’s water treatment are more suitable and common?
    The most used product for water disinfection is chlorine, given its high efficiency, easy control and relatively low costs. The CTX range of chlorinated products we trade is wide and covers all the existing needs. Visit our irrigation shops.
    Visit our Irrigation Shops to purchase this type of products
  • What products should I use for an initial treatment?
    Initial treatment is advised to have crystal clear and disinfected water. Such treatment consists on performing a chlorination shock with 15 g/m3 of CTX-200/GR Granular Dichlor or with CTX-250 Quick Chlorine Tabs (1 or 2 tablets/m3), applying the product directly into the water or using the skimmers. This chlorination must be completed with an algaecide CTX-500/S Concentrated Algaecide or CTX-530 Algaecide Extra with a dosage of 1 l/100 m3 of water.
    Visit our Irrigation Shops to purchase this type of products.
  • What procedures should I follow to carry out the maintenance of my swimming-pool during the year?
    A maintenance program consists of daily and weeklyprocedures during the bathing season. The winterizing of the swimming-poll is done in Winter time.

    1.    Analyze the water's pH and if necessary adjust it between 7,2 and 7,6;

    2.    Analyze the level of Free Residual Chlorine, keeping it between 0,5 – 2 ppm. Should you use a doser, regulate it so as to maintain this chlorine residual;

    3.    Remove the existing leaves and insects from the water.
    1.    Clean the skimmers and brush the walls of the swimming-pool. After that, use the vacuum cleaner;

    2.    Backwash the filter, clean the pre-filter of the pump and empty the basket. Refill with the CTX-370 Trichloro Tabs of the skimmers or doser;

    3.    Add the correct dosage of maintenance algaecide.
    Also to bear in mind:
    1.    Keep the correct level of water;

    2.    When you change the water of the swimming-pool, analyze the chlorine and pH levels, and adjust them if necessary;

    3.    Should it be threatening to rain, increase the levels of chlorine and algaecide;

    4.    Verify and maintain a correct functioning of the chlorine doser.
    Visit our Irrigation Shops to purchase this type of products
  • What should be done to prevent the formation of algae?
    Besides the disinfectant, an algaecide must be added, in the correct dosages for each case.
  • What’s the importance of the anti-algae?
    Algae are unicellular vegetable organisms which are able to develop and quickly multiply in water, most of all with a mild temperature. Algae spores can reach the water of the swimming-pool brought by the wind or rain, as they are present in the atmosphere. There are 30.000 varieties of algae divided into 3 categories:
    1.    Green Algae - The most common ones. Have a fast growth rate and consume large amounts of chlorine.

    2.    Mustard algae (Yellow) - Usually show up on the shadowy side of the swimming-pools and may withstand values of 3 to 5 ppm of free chlorine.

    3.    Black Algae - Form dark spots and have a stratified structure where the top layer protects the ones below, making its elimination much harder. Extremely resistant the chlorine.
    Algeacides, depending on the amount used in the swimming-pool's water, are able to destroy and/or inhibit the growth of algae. By adding this type of products, you avoid the appearance of green colouring and deposit on the walls, stairs and bottoms of the swimming-pools.
  • May I use the swimming-pool after applying the water treatment products?
    You should not go inside the water immediately after using the products in the swimming-pool. The best time to apply the products is at night, or as an alternative, by the end of the day, when it’s not going to be used. Chlorine loses efficiency under high temperature, as such it’s better to let it work during the night, so that the swimming-pool will be adequately treated by the next morning. This way you will also make sure there’s some resting time.
  • What product may I use to eliminate the black stains from my swimming-pool walls?
    Empty the swimming-pool and clean the stains with CTX-51 Extra Antiscalant for Surfaces..
    Visit our Irrigation Shops to purchase this type of products.
  • How do I keep a swimming-pool clean the whole year?
    With the right water treatment procedures and following correctly the maintenance program, even during Winter, the swimming-pool’s water may be kept up to 3 seasons (3 years) under perfect conditions.
  • What products should I use for water treatment during the Winter and how often?
    When the bathing season and swimming-pool using time comes to an end, maintain the swimming-poll's maintenance program until water temperature is below 15º C. When the water reaches that temperature, do the "Winterizing" of the swimming-pool, following these steps:
    1.    Clean the swimming-pool very well, scrubbing the walls and using the vacuum cleaner;

    2.    Perform a schock chlorination with CTX-200/GR Granular Dichlor (15 g/m3 of water);

    3.    Analyze the pH of the water and make the necessary adjustments to reach a pH between 7,2 and 7,6;

    4.    Keep the filter working;

    5.    On the next day, add CTX-550 Winterizer (5 l/100 m3 of water);

    6.    Keep the filter working for about 8 hours, in order to reach a perfect distribution of the product in the water;

    7.    On the next day, add CTX-55 Antiscalant for Sand Filters, never forgetting to do a backwash after cleaning the filter;

    8.    In cold climates the level of the water must be below that of the skimmers, pipes and filters must be emptied and floating object must be placed at the surface of the swimming-pool, as precaution against ice. In mild climated, the filter must be used periodically and whenever possible;

    9.    Usage of an adequate swimming-pool cover is advised;

    10. It is important to add agin CTX-550 Winterizer inmid Winter (December, for example).
    Visit our Irrigation Shops to purchase this type of products.
    Can not find answers to your questions? Contact Us!
Swimming-pools - Maintenance and Equipment Repair 
  • What kind of care does the filter require?
    The filter is a fundamental component for the quality of the swimming-pool’s water, as it carries out its cleaning holding back suspended impurities, which besides looking bad reduce the performance of the chemical products and may potentiate the infection of the water. For it to perform its job correctly, it must be under a perfect state of maintenance and cleaning.
    The filter must be cleaned whenever the gauge shows a pressure of 1,3 Kg/cm2. Its cleaning consists of a sequence of procedures which must be carried out whenever the pressure is below the above mentioned value.
  • My swimming-pool needs to be repaired. Does your company provide such services?
    Our company does not provide such kind of services, however we may refer you to some professionals of this sector.

    Visit our Irrigation Shops.
    Can not find answers to your questions? Contact Us!
Swimming-pools - Advice 
  • What are the optimal conditions (temperature and humidity) to store the swimming-pool products without risk of being damaged?
    Swimming-pool products, which have a durability of several years, must be kept closed in a dry place, protected from heat and light.
  • What other types of care should I have with the chemical products I use in my swimming-pool?
    1.    As for all chemical products, they must always be placed out of children's reach;

    2.    Always follow the instructions on the package's label;

    3.    Do not mix products, it will not reach the desired effect;

    4.    Add water to your swimming-pool, first one product and the the other, to avoid possible reaction between those;

    5.    When diluting a product, you must never add water to the product, but the product to water instead;

    6.    Swimming-pool products should not be stored together with other chemical products;

    7.    Before making any adjustments you should know the capacity of your swimming-pool and read carefully the instructions of the supplier concerning the functioning of the installed equipment;

    8.    Keep the water of the swimming-pool always at the same level, filling it with water whenever necessary;

    9.    In general, you should not pour water over a concentrated product, but instead dissolve the product in a watering pot or put it in the skimmer;

    10. Always look for specialists for the water treatment of your swimming-pool;

    11. In case the product gets in direct contact with your eyes, wash them immediately with abundant water and search for medical help.
    Can not find answers to your questions? Contact Us!
Irrigation Shops - Working hours 
  • Which are the working hours of the Irrigation Shops?
    Spring/Summer (April to September):
    Monday till Friday: 8h30-12h30 and 14h00-18h00
    Saturdays*: 9h00-13h00
    * With the exception of Irrigation Shop of Beja.
    Autumn/Winter (October to March):
    Monday till Friday: 8h30-12h30 and 14h00-18h00
    Can not find answers to your questions? Contact Us!
  • Do you install irrigation systems?
    No, we don't, but we can indicate to you a professional installer, who works in the area where you need the installation.

    Please contact one of our 8 Irrigation Shops.
    Can not find answers to your questions? Contact Us!
  • What kind of information must I supply in order to obtain from you a landscape lighting project?
    1.    Drawing to scale of your garden indicating existing constructions and garden zones to be illuminated with preferentially a landscape project;
    2.    Electricity point 220 V and its location.
    Can not find answers to your questions? Contact Us!
Installer for Irrigation products 
Payment and delivery terms 

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