Pressure increased from 22 to 25 PSI

Pool pumps, pool filters and the plumbing of
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lmcancu
Pool Newbie
Pool Newbie
Posts: 5
Joined: Tue 01 Sep, 2009 18:03
My Pool: 26x13, inground, 1.5 hp pool pump, hayward pump, filter, and propane gas heater
Location: Montreal

Pressure increased from 22 to 25 PSI

Postby lmcancu » Tue 01 Dec, 2009 21:40

Just before I closed my pool, I noticed that the pressure had increased from 22 to 25 PSI. Normally the pool filter runs with a pressure between 22 and 23 PSI. I backwashed the filter but the pressure did not change. There was frost the night before. Do you think ice could have built up in one of the lines causing the increase in pressure? I did not notice any blocked lines as I was cleaning them out. Any other causes for the increased pressure that I may have missed. It may be fun in the spring finding this problem.


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mas985
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Joined: Tue 08 Sep, 2009 10:40
Location: Pleasanton, CA, USA

Pressure increased from 22 to 25 PSI

Postby mas985 » Wed 02 Dec, 2009 10:47

Temperatures need to be well below freezing for an extended period of time before water will freeze in the pipes so I doubt it was ice. Usually, higher pressure is caused by the filter but 3 PSI is not all that significant. What type of filter do you have?
Mark
Hydraulics 101 ; Pump and Pool Spreadsheets ; Pump Ed 101
18'x36' 20k gallon plaster/gunite pool, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge Filter, Solar Panels, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater
lmcancu
Pool Newbie
Pool Newbie
Posts: 5
Joined: Tue 01 Sep, 2009 18:03
My Pool: 26x13, inground, 1.5 hp pool pump, hayward pump, filter, and propane gas heater
Location: Montreal

Pressure increased from 22 to 25 PSI

Postby lmcancu » Wed 02 Dec, 2009 17:58

I have a Hayward s244t filter (300 lbs). I had replaced the sand earlier in the year and everything was fine up until the day before closing the ppol.

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