Replacement Unions for 1 inch flow sensor

[Mrx7899]

Upgraded to 225 want to reuse my 1 inch flows sensors for my return lines but have to get new unions where do I find replacements can't seem to find them anywhere.

 

[Rick's Reef]

You can buy them direct from Neptune's online store.

https://www.neptunesystems.com/product/replacement-unions/

Unfortunately, the shipping is pricey . Remember to order two if you need to replace both unions (you are not ordering a set but each one individually).

 

[Mrx7899]

Thanks

 

[ca1ore]

Just use the flanges from any union.

 

[Mrx7899]

They don't fit tried it threads don't match up

 

[ca1ore]

Screw the original threaded part (the part that contains the O ring) onto the end of the flow sensor, then reuse the original collar with a new flange. You may have to sand the circumference of the flange down a bit but it works fine. I've done it with most of my 1" flow sensors.

 

[Fritzhamer]

Screw the original threaded part (the part that contains the O ring) onto the end of the flow sensor, then reuse the original collar with a new flange. You may have to sand the circumference of the flange down a bit but it works fine. I've done it with most of my 1" flow sensors.

So have I. I did order the “one inch replacement Unions” from Neptune. Unfortunately though by “Unions” they don’t mean plural, in that they will send a replacement for both unions. They mean “Unions” in the singular sense. After buying three Unions from Neptune (plus shipping), I started using the flange side from regular Sch80 one inch Unions on Amazon.