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I think this is an easy one. Does the typical residential submersible pump have a check valve built into it? I have heard that this is so, but then I always see another one just before the pressure tank, so why is that one necessary if there's one in the pump? Thanks for the Wells 101 advice!

I am dealing with a low-yield well and storage tank situation. Dole valves keep coming up in the discussion. Can anyone say why a Dole valve is better than a gate valve? Seems like with a gate valve, you can adjust it to just below the well's yield. With the Dole valve, you have to know what...

Here's my nice new Hansgrohe shower valve. Notice the ugly gap between the back of the handle and the escutcheon. Anyone deal with this problem? I'm trading e-mails with Hansgrohe but it's uphill even to get them to understand that this is a design problem, not an installation problem. The...

For a DVW pressure test, how do you plug the tub? It's not practical to plug the drain and overflow, with those little cross bars in there, and I can't turn the trap to plug it caue it's connected to the overflow and the drain. Pros, what's the trick? Got an inspection in two days.

I have a 50+ year old stainless drainboard with integral stainless double sinks. It has never had a garbage disposal but I want to add one. I must remove the old drain ring from the left-hand sink to put in the one provided with the disposal unit. This drain ring is the usual cup-shaped thing...

I stubbed 1/2" PVC cold water pipes up through my slab. Now everyone says I can't run PVC cold water in the house, even though they think it's OK in Florida, Illinois, and maybe other states. I'm in California. So I'm looking for a 1/2" PVC to CPVC adapter, but all I can find is 3/4"...

I'm remodeling an older home in California with no central air, so there will be two gravity-flow natural gas wall furnaces with Type B venting up through the top plate and roof. Question is, how high above the roof should these terminate? The vent manufacturer (Amerivent) says 1 foot...