Hello Bin,
If you have not done so already, it helps to drain the system at the lowest point. Meaning apply the shut off valve first, open the faucet at the lowest point (usually in the basement or ... read more
Phillip and Clifton have it right on. That's our reference as well. Digging one level deeper, the biggest bang for your buck generally comes from direct replacement projects. Meaning, if you need t ... read more