Pump Pressure Tank Sizing

An under sized pressure tank can cause a water pump to run an excessively.

Pump pressure tank sizing.

The more a pump must run the more wear and tear occurs to the pumping mechanism and the electric motor. A properly sized pressure tank ensures your household water needs are met and your pump is protected against short cycling. Almost 2 3s or more of a tanks. Tank drawdown capacity is the minimum amount of water stored and or delivered by the pressure tank between pump shut off and pump re start.

A pressure tank is an integral part of maintaining your well. Properly sizing a water pressure tank ensures that the run time on the water pump is kept at a minimum. The pump delivery rate in gallons liters per minute gpm lpm the recommended minimum running time of the pump the minimum cut in and maximum cut out system pressure parameters. A larger pressure tank can often be a good way to extend the life of your pump and electric motor provided that you have enough space to accommodate a larger tank and where the flooring can hold the additional weight.

This should not be confused with tank volume for example a pre charged tank with a tank volume of 20 gallons has only five to seven gallons drawdown capacity depending on the cut in cut out on. Join john woodard our master water specialist. Old pressure tank sizing method in the past pressure tanks were sized to store at least 1 or 2 gallons of water for every gallon per minute the pump can produce. Pressurized well tanks extend the lifespan of your well pump by preventing rapid on off cycling of the pump and maintaining water pressure throughout your home.

Selecting a poorly made pressure tank may result in more troubleshooting scenarios than necessary. Sizing a water pressure tank properly keeps the amount of run time to the water pump held to a minimum. A 20 gpm pump needs a tank with 20 to 40 gallons of storage. A 10 gpm pump needed a pressure tank that holds 10 or 20 gallons.