It should stand to reason that keeping the water moving continuously, verses starting and stopping the flow numerous times, should help eliminate transients and water hammer. To keep the pump running continuously, Cycle Stop Valves (CSV's), Variable Frequency Drives (VFD's), or other devices must vary the flow rate of a pump to match the usage.

2013年7月10日 · I have a residential well that experiences water hammer every time the pump stops (since I've lived there so not a new problem). The well is 90' deep, the casing is 5" and the pump is a 3/4 hp 10 gpm Sta-Rite HS+ Signature 2000 4" submersible at 70' and run by a 40/60 pressure switch.

2022年7月5日 · This causes a tremendous water hammer, and in some cases will make the pump and pipe jump up out of the well. I have seen a 100HP pump and 300’ of 4” steel pipe jump a foot straight up and slam back down when the pump is started.

2009年1月28日 · If the check on the pump fails, it must be replaced. Having a second check valve will only mask the problem of the first check valve, and cause water hammer and possible contamination in the process. Cycling the pump on and off is what destroys check valves and most other equipment in a pump system.

2016年5月10日 · Hopefully the pump waits for a different year to die! When I replaced the tank, my cousin also sent me a new check valve to install between the pump and the tank. I've read your info along with other resources about multiple check valves being bad. I do get hammer thumps when the pump turns on. You can hear it through out the house -- always have.

2014年11月5日 · Using a Cycle Stop Valve with a small pressure tank and a pressure switch can have some advantages over using a pump start relay. With the pressure switch and tank the entire system stays pressurized. This eliminates water hammer and high velocities, which can occur from non-pressurized systems such as with the pump start relay.

2014年9月20日 · Cycling on and off from old style pressure tank systems will destroy pumps, motors, capacitors, relays, pressure switches, as well as cause pressure fluctuations and water hammer. Variable speed pump systems, also known, as Constant Pressure Pumps or VFD’s are expensive, troublesome, and short lived by design.

Water hammer is the number one cause of leaks. Transient pressure waves cause water hammer. These waves travel from 3,000 to 8,000 feet per second inside the pipe line. When these waves hit a dead end, closed valve, or an elbow, they cause water hammer spikes of up to 10 times the regular operating pressure.

Automatic pump control methods are described as a pump system that automatically delivers water when a tap is opened, and automatically stops the pump after all taps are closed. A variety of pump control methods have been used in the past. The Cycle Stop Valve replaces: Variable Frequency Drives (VFD's) or "Constant Pr

If you have an especially deep-set pump with a shallow water level, care should be taken to stay within the published limits of the constant pressure water pump control valve and/or the pipe itself. Even then, pipe is more likely to rupture from excessive pressure created by water hammer (caused by cycling that happens when not using a CPV).