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Thread: Dropping pump pressure

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    Join Date
    Sep 2009
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    Tucson AZ
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    Dropping pump pressure

    I've got a 5 yr old pool with in-floor cleaning system with cartridge filter. Normally when I put in a clean filter, the pressure gauge on the cartridge shows about 20 psi. I usually change the filter when the pressure reads between 28 & 30 psi. Last couple of times, the pressure reads about 18 psi when I put in a new filter. This time it's at 16.5 psi. I've checked the impeller and cleaned the pump filter basket. Pump seems noisier than before. I've got a clear cover on the pump filter and there does not appear to be any pump cavitation, so I'm thinking there's not an issue with suction. The pressure at the cleaning nozzles is definitely less than normal. Do pumps start to lose pressure over the year? Should I replace?
    16,000 gal in-ground Pebble-tec pool / Pebble-sheen spa. Jandy AquaPure 1400 SW Cl gen (SWG) system. In-floor cleaning system w/ Hayward EcoStar 2.0 HP VSP pump. Hayward 31" sand filter. 900 sq ft Heliocol solar panels (on roof) w/ separate 1 HP Pentair WhisperFlow single speed pump. Water feature with separate Hayward 0.85 HP VSP pump.

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    Mod Squad Bama Rambler's Avatar
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    Jun 2009
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    SouthWest Alabama
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    22,347

    Re: Dropping pump pressure

    The pump shouldn't just lose pressure over time. Most of the time a reduction of discharge pressure is caused by a blockage somewhere.
    Check the impeller closely for an obstruction in the vanes. Also check all the suctions for obstructions.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Join Date
    Sep 2009
    Location
    Tucson AZ
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    120

    Re: Dropping pump pressure

    Thanks. I should have mentioned that I only checked the impeller by feeling it through the filter basket opening. I was trying to avoid taking the pump apart, but I'll do that next. When you say to check the suctions, can I do anything more than just look at the suction cover at the bottom of the pool?
    16,000 gal in-ground Pebble-tec pool / Pebble-sheen spa. Jandy AquaPure 1400 SW Cl gen (SWG) system. In-floor cleaning system w/ Hayward EcoStar 2.0 HP VSP pump. Hayward 31" sand filter. 900 sq ft Heliocol solar panels (on roof) w/ separate 1 HP Pentair WhisperFlow single speed pump. Water feature with separate Hayward 0.85 HP VSP pump.

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