Low pressure

Pool pumps, pool filters and the plumbing of
swimming pools. Sand filters, cartridge filters,
fabric filters and alternative filter media.
jeff1973
Pool Newbie
Pool Newbie
Posts: 5
Joined: Wed 29 Jul, 2009 21:23
My Pool: 16X 32 rectancle vinl liner , inground pool hayward filter with hayward super pump.
Location: louisiana

Low pressure

Postby jeff1973 » Wed 29 Jul, 2009 21:36

I am installing a new do it yourself inground pool 16 X 32 i have 4 jets and once i primed pump jets have bubbles , no air leak just weak , i think. Instructions called to run all schedule 40 1 1/2 inch pipe on all plumbing and I T- the lines 2X2 or one 1 1/2 inch to 2 jets on one side and 2 on the other . I guess what i'm asking is do i possible have a 1 1/2 inch pipe feeding a 3 inch flow? What else could be causing this problem?


jeff1973
Pool Newbie
Pool Newbie
Posts: 5
Joined: Wed 29 Jul, 2009 21:23
My Pool: 16X 32 rectancle vinl liner , inground pool hayward filter with hayward super pump.
Location: louisiana

Low pressure

Postby jeff1973 » Thu 30 Jul, 2009 07:10

Anybody , Do I have to many returns?
superdoopie
Pool Care Proficient
Pool Care Proficient
Posts: 40
Joined: Wed 22 Jul, 2009 15:19
Location: Philadelphia, PA

Low pressure

Postby superdoopie » Thu 30 Jul, 2009 08:04

What horsepower pump do you have? What size filter and what media (cartridge, DE, sand)? What is the pressure on the filter gauge? How long is the run to and from the equipment? How much wood could a woodchuck...?

You shouldn't have air coming out of the returns unless they have air venturis that suck air in from above the water level to inject air into the water.
jeff1973
Pool Newbie
Pool Newbie
Posts: 5
Joined: Wed 29 Jul, 2009 21:23
My Pool: 16X 32 rectancle vinl liner , inground pool hayward filter with hayward super pump.
Location: louisiana

Low pressure

Postby jeff1973 » Thu 30 Jul, 2009 15:34

I HAVE A 1HP HAYWARD SUPER PUMP.The filter is filled with sand and I'm not sure of the size of filter , approx. 3 ft high and 4 ft around. pump and filter are about 18 ft from pool and about 4 ft. above pool level.
jeff1973
Pool Newbie
Pool Newbie
Posts: 5
Joined: Wed 29 Jul, 2009 21:23
My Pool: 16X 32 rectancle vinl liner , inground pool hayward filter with hayward super pump.
Location: louisiana

Low pressure

Postby jeff1973 » Thu 30 Jul, 2009 15:38

And also it is reading about 11 psi.
czechmate
Swimming Pool Superstar
Swimming Pool Superstar
Posts: 401
Joined: Sat 16 May, 2009 09:20
My Pool: 16 x 32 gunite21000 gal., Diamond Brite Blue, Swimquip XL pump, DE36
Location: Texas

Low pressure

Postby czechmate » Thu 30 Jul, 2009 16:52

What signifies to you, that the pressure is low?
The fresh water inlets do not show a force to the hand feel ?
The gauge does not show a pressure of water force.
It shows a backpressure, resistance of the obstacle, in this case the filter element.
Backpressure of 11psi is close to ideal. A few pounds makes a lot of difference in the daily cycle of turning the pool volume. It can easily shorten the run from 8hrs to 6hrs. In a month time it can save you a 30 bucks.
I have 4 returns and backpressure of around 12psi when DE is fresh.
Piping is standard 1 1/4" Sch40. Filter DE36 sqft. Pump 1 1/2HP Swimquip XL (26yrs old).
Full cycle about 6hrs on 21000gal.
superdoopie
Pool Care Proficient
Pool Care Proficient
Posts: 40
Joined: Wed 22 Jul, 2009 15:19
Location: Philadelphia, PA

Low pressure

Postby superdoopie » Thu 30 Jul, 2009 19:47

11 pounds on the filter is pretty average.
jeff1973
Pool Newbie
Pool Newbie
Posts: 5
Joined: Wed 29 Jul, 2009 21:23
My Pool: 16X 32 rectancle vinl liner , inground pool hayward filter with hayward super pump.
Location: louisiana

Low pressure

Postby jeff1973 » Tue 04 Aug, 2009 07:34

I found leak, it was sucking air on the pipe going into filter. Plumber's puddy works way better than tape. No air bubbles anymore, system is running like a champ.

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