Recent content by tarantino

I think it's just old. Salt and moisture are probably factors, too. It is just the surface. Any specific material for the topping slab? I thought cement doesn't adhere well to old cement.

Most likely. Northeast.

What is the best approach to a crumbling, pitted concrete garage floor? Not something that just needs a good cleaning and crack filling. Pits, let's say up to 0.5" deep, 1-2 feet wide.

Is there a reasonable, not top of the line, micron gauge for $100?

Ok but why a different micron gauge for each refrigerant?

I do have to wonder what difference it makes what refrigerant one will use when vacuuming an empty system.

Yes, I know you can't rely on the manifold to read the vacuum accurately.I know Nylog well, though I wasn't using it now. I will do the final evacuation without the manifold.

The drop was drastic. From -30 to -10.

Yes, thanks. As of now, I know the manifold leaks. I redid the evacuation and closed off the LP valve. The pressure in the manifold dropped exactly the same way after a few hours.

I wonder if you need to disconnect the manifold for a vacuum test. A newly vacuumed mini-split held well for at least an hour but showed a steady drop after several hours. That's with the lowside continuously connected to the gauge.

Sure: https://www.zoro.com/zoro-select-structural-pipe-fitting-swivel-flange-cast-iron-075-in-pipe-size-50000-lb-tensile-strength-30lx06/i/G9089412

In case this would be helpful to others. This is what I ended up using, which, for the most part, did the job. Used the following with 6 m 3/4" steel pipes.

Theoretically, up to 400 lbs, realistically probably half as much. Could you link to a hinge like that?

One time thing. It won't need to win any beauty contests.