stop & waste valves, globe-type valves, and pressure regulator valves

[mm]

I'm considering installing a water-powered sump pump, and the instructions include:

Pipeline restrictions Pump should be teed-in before any devices that restrict water flow. Examples of such devices are: stop & waste valves, globe-type valves, Pressure Regulator Valves (PRV), water conditioners, filters, etc. ... Zone (RPZ) devices may reduce pumping rates significantly

What does it mean by stop & waste valves, globe-type valves, and pressure regulator valves? Do I have them?

All I have between the street and where I plan to connect it are

1) an standard shut-off valve which is fully open. 2) a pressure-regulator, I think it is, but not afaik a pressure regulator *valve*. I haven't seen this thing since I moved in 27 years ago and put a wardrobe in front of it, but it was small, only a few inches from where the water pipe comes in the foundation wall, and I think every home in the area has one, not to lower the pressure below spec, but to keep it from going above spec.

The water flow is over 10 GPM, measured at a garden faucet. Doesn't that imply that there aren't debilitating pipeline restrictions?

[Molly Brown]

What are the minimum flow and pressure requirements for it? What is your pressure at the garden faucet when it=92s putting out 10GPM?

[mm]

The minimum flow requirement is 10 GPM. Their suggestion was to fill a five gallon bucket and see if it did so in 30 seconds. It did, or maybe a little less. I can repeat this test if for an exact number if it will help.

The minimum pressure requirement is 40 PSI Some years ago, I called the he water company or found on their webpage that their nominal pressure was 40 PSI or more. I don't remember the number, but I can check on that again too.

The neighborhood is 31 years old, and my house has copper pipes. They don't approve of iron pipes because they rust, get narrower, and the rust can come off and mess up their pump.

r 410-396-5352.

[Robert Allison]

Stop and waste and globe valves are valves that restrict the flow of product in the line. The pressure regulator is indeed a valve, but if you have enough pressure after it, you should be ok. Your "standard shut off valve" will be either a gate or a ball valve.

I believe the pressure regulator valves that your instructions are warning against are a different type of valve (I use them often in industrial applications). You would not want them because they also restrict the flow in your line.

You should be just fine.