The sewage lift pump requires priming water every time it is started
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The device has an underground sewage tank, and the pump needs to be filled with water each time sewage is pumped out. Is it this kind of pump? Is it still our method that’s wrong? Please share your thoughts, thank you
Generally, it is necessary to fill the pump casing with water; if there is air outside, this is the case regardless of whether water is pumped upward or downward
Whether it is a self-priming pump or a regular centrifugal pump, in either case it is advisable to install a small siphon tank at the pump inlet; the pump inlet should be located at the bottom of the tank, while the pipes from the underground oil storage tank should be connected to the top of the tank. A valve should be installed between the pipes and the tank, and a check valve should be placed at the lowest point of the pipes. An exhaust valve should be added at the top of the tank to allow gases inside the tank to be released or to be used for filling the pump. Turn on the pump to fill the tank with water, ensure that the pump is properly filled, remove any gases from the tank by closing the exhaust valve, and then start the pump again
It is recommended to check the check valve at the pump inlet; if one isn’t present, install one. If there are many mechanical impurities in the wastewater, the check valve may not function properly either.
We have sewage tanks in two locations here; one uses diaphragm pumps and the other uses submersible pumps. Occasionally, the pump inlets get clogged, and backwashing by pouring water into the pump inlets will resolve the issue
What do you mean by tank water diversion? Before starting a vertical pump, the medium must cover the impeller.
If the water contains few impurities, a submersible pump can be used; if there are relatively many impurities but no large particles, a slurry pump (which is similar to a sewage pump, designed to be used underwater and equipped with an auxiliary impeller) can be utilized
I don’t understand what it means. If the pump can be placed in water, then use a WQ submersible sewage pump; if it cannot be placed in water, then a self-priming pump or an underwater pump can be used
Based on your description, it seems to be a self-priming pump with a liquid storage tank in front of it. It’s possible that the check valve of the self-priming pump is leaking, or that no check valve was installed at all; as a result, after the pump stops working, the liquid in the tank leaks into the sewage tank. Therefore, it’s advisable to check whether the seal of the check valve is proper.
What is the depth of the pool on your end? If it’s around 5 meters, a diaphragm pump can be used, which avoids the need to fill the pump