Review on 💦 Grundfos SCALA2 98562818 3-45 AVCBDF 1x115V 60Hz Auto Water Pressure Boost Pump by Jnis Labucis ᠌

At the mother-in-law and father-in-law in the village, Dzhileks, who worked for 8 years, messed up - he himself saw and heard. Since he was familiar with Grundfos pumps, the choice fell on him. I was very pleased with the weight - even a pensioner can drag him into the bat. Installation is also easy. Really quiet - if it stands firmly on the ground, it is better to screw it on, and native flexible hoses are used = the result in terms of noise (the pump in the underground under the kitchen) is better than the refrigerator. But here is the logic of its work . It is especially felt when distributing water through bad (not good enough) mixers (with high hydraulic resistance). In reality, it can turn off every about 25 seconds for 3 seconds - and work in such cycles. Consider that there is no opportunity to "play" with the settings - the built-in "anti-cyclicity" (I suspected a defect in the translation of the instruction - this has happened repeatedly) does not affect the behavior. The doentation does not reflect the purpose of the for air - if you look from the back of the pump above the control panel, the valve is like a bicycle. This is an air bag (spring) of the built-in storage tank. The pressure in it should be important for the operation of the pump automation, but consider that there is no description. According to my observations, the work became less cyclical after the air was completely bled (it's okay - if you bleed the air, then by turning off the pump and unscrewing the top valve, you can pump it up again, the default pressure is 2.5 atmospheres). What else should you pay attention to (regardless of Grundfos) - most of the water intake pipeline is not metal, but plastic = under the weight of a column of water + its own weight, it definitely contracts and stretches (choose high-quality pipelines) = pressure change (water rolls back) at suction at stop = play automatics. To protect against this, Grundfos puts a check valve at the inlet and outlet of the pump, but, according to my observations, not all of these valves are inserted during embly and, if sand or other rubbish gets in, they can be etched. It should be simpler, less automation, well, why the hell is the pump already a microprocessor ? !