Plumbers need help.

I am in need of a 3/4 inch pex coupler that does not let water pass through it. I am trying to figure out how to do this. I have some tenants that know a little bit about plumbing and will turn the water right back on if I shut it off. I figure this is the best way to keep it off. Any ideas??? I can’t find anything online.

This is a mobile home BTW not connected to it’s own shut off from the city.

They make 3/4 in pex shut-off valves, but I’m assuming you want something a little less obvious?

I’m wondering if you can jam a 3/4 in or 1/2 dowel in a standard female-female fitting, with some water-proof caulk?

Cap the sucker. Then when you are ready to have it on, install a valve into the cut line.

Also— you can buy locking turn valves.

If the tenant knows more about plumbing than just turning on a valve, there is NOTHING you can do to keep them from doing so. If you cap it, they can always use a pex removal tool (horseshoe) to take it off. If you really want to keep the water off, put a lock on the valve at the street!