On my Travelstar 21 SSO, when I run a faucet at low pressure, the pump surges low and high. If I turn on two faucets at the same time, it sounds normal. Any ideas?
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That is normal, the pressure switch comes on, the pump comes on, it's designed to pump so much a minuet. You have the facet restricted, the pump shuts off. Pressure drops, pump comes back on. Will cycle on and off. Bill
Add an expansion tank. The larger the tank you add, the longer the cycle between on/off will be.
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You might try adjusting the pressure switch on the water pump. I have a Shur Flow (spelling?) and the manual states that you can make an adjustment by turning one faucet on low and adjusting the set screw on the pump 1/4 turn at a time until the pump stays off for 2 seconds before turning on again. The set screw is right on the front of the pump by the intake line on my model. Not sure if this will help the surge but it will reduce the number of cycles at low flow and extend the pump life.
Thanks for the advice on the set screw...I will try that.
I should clarify when I say surging, I don't mean completely on and off. It's more like the pump on full, then somewhat half, then full, etc. The water coming from the faucet follows it...full pressure, lower pressure, full pressure, etc.
BrianOhio wrote: Thanks for the advice on the set screw...I will try that.
I should clarify when I say surging, I don't mean completely on and off. It's more like the pump on full, then somewhat half, then full, etc. The water coming from the faucet follows it...full pressure, lower pressure, full pressure, etc.
Thanks.
The expansion tank will also cure this problem. Without an expansion tank the water flow is directly related to what the pump is pumping. With an expansion tank the pump will run longer when it 1st comes on to build the pressure in the tank. You can then turn on a faucet and run some water and the pump will not come on as soon, you will be running water off the cushion of air the pump pressurized while on for the 1st time. Your water pressure will be much more even due to having a cushion of air in the system.
You might try draining and refilling the hot water heater. I read once some tanks have a space in the top of the water heater to hold air to help absorb the pressure rise due to expansion from the water as it heats. If it has been awhile since you drained the hot water tank it is possible the air has been displaced with water.
I would have added an expansion tank to this TT we have now but what little problems we have due to the lack of one, never seems to justify the cost. I would estimate the cost of adding an expansion tank at about $50.00, home depot handles some large sizes. You are supposed to adjust the pressure in the tank a couple pounds above or below the incoming water pressure, I forget which, I am sure another search, or post will get this answer for you.
* This post was
edited 07/25/08 06:39pm by Rvndave *
An accumulator tank does not have to be large to work. I have had this one in my campers for several years. It does a nice job of smoothing out the pulsing from my WhisperKing water pump.
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