Hi new to this forum so hopefully explaining this correctly. Before I added my pool heaters my filter pressure was at 10 after backwash and new DE. I then added a Hayward heat pump and a Raypak propane heater. The Raypak has a built in bypass however the Hayward does not. It appears that the Hayward heat pump is causing the pressure to go from my old normal 10 to with heat pump valves on 20. Is this normal?
adding heat pump doubles filter pressure
- Thread starter JTW
- Start date
Welcome to the forum. 
I am not the best resource but it does seem too high. I'll let others with heaters chime in and see if they agree. That a lot of resistance...4 psi increase I would say OK but not 10 psi.
I am not the best resource but it does seem too high. I'll let others with heaters chime in and see if they agree. That a lot of resistance...4 psi increase I would say OK but not 10 psi.
Perhaps the diameter of the piping within the heat pump is smaller than your pool pipe? That would create more pressure.
It also has a fair amount of bends but it should be smooth copper (?) bends within a single piece of pipe I would think.
It also has a fair amount of bends but it should be smooth copper (?) bends within a single piece of pipe I would think.
thanks guys! not sure of HP internal pipe dia but will check. im hoping that's not it since someone else I know has the same heat pump without this issue.
Normally the flow range is 30gpm min and 70 gpm max for these small heat pumps. I see you have a 2.5hp pump. This may need a manual by pass to control flow.
- May 3, 2007
- 16,828
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
You added two heater in series? Heaters can have a lot of head loss (especially if it does not have a builtin bypass) and adding two in series could be causing the extra rise in PSI.
At what RPM was the pump setting with the two PSI readings?
At what RPM was the pump setting with the two PSI readings?
I'm not that smart but why are you adding a heat pump and a pool heater? If your flow is going through both, (in series) your filter psi will probably double for certain
I have a manual bypass for the Hayward heat pump and when enabled the pressure goes down. What would be a normal expectation for the addition of the heat pump as far as pressure goes? Im guessing its not 10 correct? Thanks for your reply!
I have two heaters, one heat pump and one gas. To extend the season north of Philadelphia the heat pump does not always have enough power to recover from a cold night or cold rain. With the propane backup I can have my pool ready in hours instead of days (we swim almost every day.
I guess my question still is does 20psi sound normal with a heat pump with no internal bypass and a gas heater with an internal bypass?
For the rpm question it will jump up to 20psi at 3k rpm and up. At low rpm's it sits at 10psi (with no bypass).
thanks everyone for the help!!
I guess my question still is does 20psi sound normal with a heat pump with no internal bypass and a gas heater with an internal bypass?
For the rpm question it will jump up to 20psi at 3k rpm and up. At low rpm's it sits at 10psi (with no bypass).
thanks everyone for the help!!
- May 3, 2007
- 16,828
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
Yes, I think that is reasonable for a heater without an internal bypass and one with an internal bypass but both in series. The total head loss of that set up at 60 GPM (3000 RPM) could easily reach 23' of head (10 PSI rise).
Thanks Mark, I guess the question now is there a better way to set up two heaters or am I ok with this setup?
- May 3, 2007
- 16,828
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
The best setup probably depends on how you plan on using the heaters and how often they will be used.
Was happy to find this thread.
We just added a Raypak 6450 to our setup (hayward super pump 1HP, Hayward 200lb sand filter) and saw the pressure jumps from ~12-14 PSI to ~20 PSI when going through the heatpump.
I was paranoid the installers mucked it up, or something was lodged in there!
We just added a Raypak 6450 to our setup (hayward super pump 1HP, Hayward 200lb sand filter) and saw the pressure jumps from ~12-14 PSI to ~20 PSI when going through the heatpump.
I was paranoid the installers mucked it up, or something was lodged in there!