Sta Rite Punp #DHJ-170 suddenly has low, cycling pressure after 3 years seasonal operation
Hello, W/D here, at your service.
There are a couple of things that can cause a low cycling pressure as you described.
First, check the tank. Look for a schrader (bicycle type) valve on the top of the tank. Check the pressure. Normally, there is a sticker denoting the proper pressure of the bladder in the tank with no water in the tank. Mine calls for 29 psig. If yours is low, air it back up to the proper pressure and re-test the flow.
Next, if the first check didn't do the trick, is to determine if there is a leak in the well. Operate the pump up to its normal kick-out pressure and turn it off. Close the discharge valve, and watch the pressure gauge. If the pressure falls, the cause of the cycling is probably the seal in the well. You didn't indicate if your's is a shallow or deep well, but repairs are similar. These pumps are also used in pool service for circulation, but this doesn't sound like your use. If yours is in a well type water service, and the pressure falls as described, you will need to pull the inner piping and replace the leathers, as water is escaping back down the well. It has been my experience that it is better to replace the foot valve, jet and leathers all at the same time, rather than to replace the leathers alone. Find a reputable well supply company, and take your parts with you. My local company will put everything together for me, if I buy the parts, of course. If your pump is in drinking water service, disinfect before re-assemble according to local regulations. Your local well supply can advise, and it is usually a simple and inexpensive task. Whilst purchasing parts, be sure to purchase the gaskets that you will need for re-assembly. The pump gasket and the well head gaskets are most common. I keep spares of most of these parts, as my pump seems to always break on Sunday morning, or late Saturday night!
Anyway, try these things, and see if it doesn't get you back up and running. Best of luck.
Best regards, --W/D--
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