Best way to install a device (propress) in an immobile pipe?

sunlight33

To install a device (like a dirtmag) with press connection on a 1'' straight pipe and the pipe happens to be immobile after cutting, is inserting a short piece of pipe into each end of the press then use no-stop coupling the only way?

EBEBRATT-Ed

If you absolutely can.t spread the pipe apart then yes. Either slip couplings or unions around the filter are better but cost $$

hot_rod

The Caleffi NA 5453 has press union connections, very simple to add in .
NA 545366 press, 545356 with iso valves.. It can be used on a vertical or horizontal line also.

mattmia2

Not many situations where you can't undo a pump flange or some hangers or both to get the 3/4" or so to slip the fittings together.

sunlight33

For my case it's either between the DHW tank and an elbow against the wall, or inlet of a LLH and an elbow against the wall. I can probably cut the elbow and rebuild from there but prefer something simpler.

I notice for the Viega union fitting, the part where the two are mated, one goes inside of another by about 1/8'', so should I screw down everything and use that as a guide to cut the pipe? (or leave 1/8'' of wiggle room?)

hot_rod

here is an example

pecmsg

Slip Coupling 
or
2