Eric

Where does the ASHP drain go to 👀

Might be better with something like this then

That is a grease trap / gully, meant for kitchen / utility. Just a rain head & elbow is all you need.

Welcome to the forum, you are in good company 😬

40 grit sandpaper 😉 I thought this house was actually finished…?

Welcome to the forum. Lots of ASHP info available if you search for it.

@LaChab if you decide to use DuPont Tyvek Airguard I have a new roll leftover for sale.

It looks like it’s closed (screwed in) There will be no flow to that circuit (no water in the meter) just unscrew - anti clockwise to get the desired flow & there will eventually be water in the meter.

Living with the in-laws I can’t not afford you Nick 😎

Good advice from Nick & very generous offer of help. There will be a solution, I’m sure the heat pump can be run without the thermostat. The most important thing to do is PM me Nicks number once you get it, I need to start my plumbing very soon & I need him on speed dial 😉😬

Yes, it is basically opaque straight out of the tube. It’s neutral rather than clear.

Not even sure I understand 😂 Could you put a plastic pipe in the cored hole, plaster up to & around, then fill the plastic pipe with expanding foam?

Don’t suppose you have the core that was drilled? Could glue it back in place. You could fill the hole with stone & mortar.

What is on the drawings? I would of expected pir infill of the rsj before the osb.