Installing heat pump. PVC coupler too long - Need help.

cpotter638

Well-known member
Apr 5, 2011
80
Springfield, MO
I'm a plumbing novice. Installing a pool heat pump. Installation manual recommends installation of a pressure check valve for larger pool pumps (which we have); however, no information is supplied re: installation.

Have found installation suggestions via an instruction manual of a different heat pump manufacture.

I'm installing a 5# spring check valve (per detailed recommendations of the other heat pump manufacture). In the instruction manual it states "...check valve must be installed with no bends or reducers between check valve and heater".

I'm attempting to install as recommended in manual / diagram; however, in and out heater ports are not an ideal distance apart. Check valve is too short in length and addition of a coupler results in too long of a length. See photos.

My options (inexperienced as they are):
1) Add 2 90 degree elbows to heater out port to give me more length for both check valve and coupler. This is the best solution that I can come up with. However, this would not jive with the instructions of "no bends or reducers between check valve and heater". I assume adding bends would be better on out port than in port.

2) Find a "short coupler" that will work with my scenario. Online search revealed no luck in finding such an item.

3) Trim coupler with hacksaw. I suppose this could be done, but I'm guessing this is not ideal. Don't know how badly this would compromise the integrity of plumbing.

Any suggestions? Thanks in advance for the help.
Chad
20190527_162114.jpg20190527_162150.jpg
 

Flying Tivo

Well-known member
Jan 24, 2017
1,015
Monterrey, NL, Mexico
The picture is too close. Are you trying to put a check valve between input and output of the heater? A check valve would not moderate flow it will just shut it off completely or prevent a backflow. So not sure what you are trying to do.
 

Flying Tivo

Well-known member
Jan 24, 2017
1,015
Monterrey, NL, Mexico
Normally check valves are installed after heater/before inline chlorinator/SWG, this is to prevent high concentrations of FC to enter the heater. The next most common practice is to install a bypass valve which will let you isolate heater in case of bad chemistry.
 

JamesW

TFP Expert
Mar 2, 2011
15,546
What model heat pump?

If this is to create a self regulating external bypass, I would just loop up.
 

jimmythegreek

Bronze Supporter
TFP Guide
Aug 10, 2017
1,112
Morris Cnty NJ
Just get 2 new unions and be careful cutting and glueing the pipe. You want to cut and glue so you make the one T fitting a glue then thread on while wet scenario so it lines up easily
 

cpotter638

Well-known member
Apr 5, 2011
80
Springfield, MO
I'm installing a Hayward HP21404T.

This is in regards to a bypass check valve that only opens during high flow rates (over 70 GPM or so).

I'll have separate bypass valves (to isolate heater for maintenance) and a separate check valve (to prevent high Chlorine backflow into heater. I know this is not technically needed, but installing in case of any warranty issues in the future).
 

ps0303

TFP Expert
In The Industry
Jul 6, 2011
4,004
FL
I have never seen a spring check valve installed in the location you are showing. I have seen a hand valve where you can open and close but no spring check valve.

If you are really pressed to do this, you can find a shorter coupler in the plumbing section of the big box hardware stores.
 

cpotter638

Well-known member
Apr 5, 2011
80
Springfield, MO
I have never seen a spring check valve installed in the location you are showing. I have seen a hand valve where you can open and close but no spring check valve.

If you are really pressed to do this, you can find a shorter coupler in the plumbing section of the big box hardware stores.

AquaCal specifically calls for this check valve. Hayward recommends a bypass if over 75 GPM. From AquaCal instruction manual:

103524
 

cpotter638

Well-known member
Apr 5, 2011
80
Springfield, MO
Look for an inside coupler it might be easier to fit.

Thanks. This is what I was looking for.

Options:
1) Use this coupler to install as I planned (as shown in installation manual photo).
2) Make loop upwards to accommodate additional union installation for spring check valve maintenance / replacement.

Anybody used a similar spring check valve? Don't know how likely it would be to have to remove debris from valve.

Thanks again. Chad
 

JamesW

TFP Expert
Mar 2, 2011
15,546
I would loop upward.

The Pentair Ultratemp has a spring bypass.

R172305 Water Bypass Check Valve.
 

ps0303

TFP Expert
In The Industry
Jul 6, 2011
4,004
FL
Hmm, I've seen lots of these units installed and never seen the spring check valve in that location. Many units have the check valve internally so the installer doesn't need to add one.