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I'm running pex water lines within an indoor baseboard chase. I'll be insulating the hot lines with foam tubing to retain heat, but was wondering if I should also put foam tubing on the cold lines to...

One last time on the toilet drain.
Because of obstructions and space limitations, I need to have the toilet drain into the
stack lower than the tub and sink.
Would there be any potential problems...

In the following picture, assuming that the 'other drainage' pipe cannot be moved, which would be the better arrangement, A or B ?

Thanks,
Arky

...

I would appreciate one last review of my plumbing layout.
Thank you for your previous comments.

Some changes are:

By repositioning the kitchen sink slightly, I was able to keep the trap arm...

Sorry, I wasn't clear on the main stack; there is no upstairs, the main stack is the main vent.
With that being the case, would A or B be the better configuration ?

Thanks,
Arky

Which of these is the best configuration for a toilet drain ?

Going to assume that C is incorrect because of no immediate vent pipe; that leaves A or B.
Which one would be the best configuration...

Thanks to everyone who commented on my previous posts about my proposed plumbing.
I have redrawn the plumbing and changed a number of things, so I thought it might be best
to ask for new comments...

This is my proposed arrangement for the plumbing of my retirement house.
The outside walls are finished; no plumbing will be within them.
Also, I don't want to go through the metal roof, hence the...

I understand what you're saying, but in actual use it doesn't act like that.

In other words, even with the current setup (no tank, and using the 38/42 pressure switch on the pump), there is no...

This is a bladder pressure tank.
When the tank is empty of water, the bladder will be up tight against the inside of the tank (water connection end) just as it would be before even connecting the...

I am adding a 2 gal. pressured bladder accumulator tank and a 20/40 pressure switch to the 12VDC pump in my travel trailer.
The pump currently has a built in pressure switch that closes at 38 psi...