In Line Check Valves

[Lazurus]

I want to join a couple of small compressors together to one air hose. I am looking for an in line check valve (x2) to puy inline from each compressor so they don't fill each others tank (Ooooer!)

 

Can anyone suggest what and where, just something I can put in the standard air line as I do not want to go to metal plumbing or copper tube etc..... would the below be suitable?

 

https://www.bes.co.uk/1-4in-bsp-single-check-valve-110-c#product-details-tab

[GardenKit]

I cannot see the need for the valves, just let them fill each other's tanks and equalise the pressures.

[Dan Maynard]

Are you going to spray or something like that using lots of air? If you draw down slowly I think you'll find that one of the machines must have a slightly lower trip on the pressure switch so effectively it will do all the work. If you draw enough air then the common pressure goes below the switch point for both so they both cut in.

I don't think a non return valve is really needed either, but you might want to put some isolating valves so that you can take out one compressor without draining both tanks, depending on what's on the outputs.

That valve says hot/cold water so I wouldn't use it personally. Look for something by SMC, Festo, Norgren eg
https://uk.rs-online.com/mobile/p/pneumatic-positive-pressure-vacuum-non-return-valve-function-fittings/8497231/