What fitting is this?

[MikeForbes]

Hello, looking to pick your brains please.
I recently bought a heat pump second hand from a well known market place. The fittings aren't something I recognise, and Google Lens isn't helping. I was wondering if they might be 2" union connections, but the external diameter (74mm) doesn't seem to match.
One idea is to get a giant spanner to unscrew the connections and replace with a 1.5" heat pump union, which should match my existing pipework.
Any thoughts?

Many thanks,
Mike.

 

[JamesW]

Model of Heat Pump?

 

[JamesW]

 

[JamesW]

2" PVC Union, Schedule 80, EPDM O-Rings, ANSI Slip Socket

This is a 2", schedule 80, PVC union with a grey body. It has EPDM O-Rings and ANSI slip socket connections.

gloxco.com

2″ PVC Union, Grey Body, Schedule 80, EPDM O-Rings, ANSI Slip Socket
$13.67

2″ PVC True Union
uPVC Body, EPDM O-Rings, PTFE Seat for corrosion resistance and superior strength
Inline 2″ Female ANSI Slip Socket Connections

SKU: U-200FS-PVC80

 

[MikeForbes]

Heat pump is a Hydro-Pro 14/32
And those do look very similar! Are those 2" unions then?
Thanks.

 

[JamesW]

And those do look very similar! Are those 2" unions then?

Edit: I cannot tell for sure, maybe 1.5" or maybe 1.25".

 

[JamesW]

 

[MikeForbes]

Thank you! Time to go shopping...

 

[JamesW]

For a 2" Union, this part is 2.375", which matches the O.D of 2" PVC pipe.

The inside of 2" PVC pipe is 2.047".

 

[JamesW]

Note that I am not sure that the union is correct; it is the closest I could find.

Dimension "P" is 2.047", which is the ID of PVC pipe.

Only that dimension will match the 2" pipe description.

If the union walls are 0.3375", the union OD (measure 3) should be about 3.05".

X should be about 4" for a 2" union.

The outside union nut will be about 4.65"

So, you probably have 1.5" unions.





https://www.grainger.com/product/11W264

1 1/2" Schedule 80 PVC Union Socket, 897-015

1-1/2 UNION S, 897-015

pvcpipesupplies.com

Schedule 80 PVC 1-1/2-in SOLV Union

bkproducts.com

https://www.lowes.com/pd/Charlotte-Pipe-1-1-2-in-x-1-1-2-in-x-1-1-2-in-dia-Schedule-80-Union-PVC-Fitting/3695984

https://www.nibco.com/nibco-products/fittings/industrial-plastic-fittings/pvc-schedule-80-fittings/4533e/

1-1/2" Schedule 80 PVC Union 858-015

Buy 858-015 1-1/2" Schedule 80 PVC Union at PVC Fittings Online and receive huge savings on all Schedule 80 CPVC, Schedule 80 PVC and Schedule 40 PVC fittings

www.pvcfittingsonline.com

 

[JamesW]

 

[JamesW]

 

[JamesW]

After more research, I do not know the exact model number.

There are a lot of manufacturers and the picture is not enough to go on.

 

[JamesW]

Heat pump is a Hydro-Pro 14/32

It says 50 mm, but I do not know.

Hydro-Pro Inverter PX14/32 - 14kW

www.hydrospares.co.uk

https://www.air-heatpumps.com/pdf/PX_heatpumps.pdf

https://hydrospares.2dimg.com/resources/1651072801_4505.pdf

HYDRO PRO HEAT PUMP LESSO PVC - U 50 mm UNION NUTS AND PIPE SLIPS BLUE (pair) | eBay

TO CONVERT TO IMPERIAL 1.5" UK POOL PIPE. TO ACCEPT STANDARD UK POOL 1.5" IMPERIAL PIPE.

www.ebay.com

Balboa Pump Union Tailpiece PVC | 50mm Socket (2" Spigot)

www.hydrospares.co.uk

Hydro-Pro Inverter PX14/32 - 14kW

www.hydrospares.co.uk

Standard model have slip glue fittings which accept 32mm or 50 mm PVC pipe for connection to the pool or spa filtration piping.

By using a 50 NB to 40NB you can plumb 40NB

 

[JamesW]

Hydro-Pro Heat Pump Water Connection Union (Each) | Automated Environmental Systems

Replacement Hydro-Pro Heat Pump Water Connection Unions, two parts include nut with screw thread and 50mm glue socket

www.automatedenvironmentalsystems.co.uk

Replacement Hydro-Pro heat pump water connection union, each union is formed of two parts including nut with screw thread and 50mm glue socket, supplied as a single union.

Sales and technical help
Not sure what product is right for your application? Need help selecting the right model?

Our sales team is available Monday to Friday, 9am to 5pm

01284 658770

Mon - Fri 9am - 5pm (you can leave a message out-of-hours)

Click to email us

For all sales or technical enquiries.

[email protected]

Swimming Pool Heat Pumps | Automated Environmental Systems

Automated Environmental Systems is a UK Supplier of swimming pool heat pumps, an air source heat pump can save you 80% on your pool heating costs

www.automatedenvironmentalsystems.co.uk

https://www.automatedenvironmentalsystems.co.uk/wp-content/uploads/2020/07/AES-Hydro-Pro-Inverter-Type-PX-Swimming-Pool-Heat-Pump-Manual.pdf

 

[JamesW]

SALES & SERVICE: 01842 819130

 

[JamesW]

Automated Environmental Systems Ltd.

Address: Unit B Anglian Ln, Bury St Edmunds, Bury Saint Edmunds IP32 6SR, United Kingdom.

Contact Us | Automated Environmental Systems

Automated Environmental Systems, contact us by phone, email, in person or use our contact form, you can also connect with us on Facebook

www.automatedenvironmentalsystems.co.uk

Hours: Closed ⋅ Opens 9 AM Tue
Phone: +44 1284 658770

 

[JamesW]

Automated Environmental Systems

Automated Environmental Systems sell a large range of pumps and pumping equipment throughout the U.K. and Europe. With over 25 years experience in the pumping & water industry we can find a solution for all your pumping needs. Our YouTube channel features a series of how-to and what's-in-the-box...

www.youtube.com

 

[JamesW]

I just realized that you were in the UK.

Are the fittings blue or grey?

Seems like these are the likely fittings.

Contact the manufacturer to be sure.

Hydro-Pro Heat Pump Water Connection Union (Each) | Automated Environmental Systems

Replacement Hydro-Pro Heat Pump Water Connection Unions, two parts include nut with screw thread and 50mm glue socket

www.automatedenvironmentalsystems.co.uk

 

[MikeForbes]

Thank you James, for all of this detail, a lot to digest for sure!
The existing fittings are grey.
I will read all of this and make some calls in the morning and update this thread for posterity.
Thank you again, much appreciated.