I’m getting quotes for new sump pit liner. So far pricing is within $100 from two quote. Getting one more on Monday. The work involves Chopping out concrete floor. remove old collapsed liner. Install new plastic sump croc (from old 12" dia to current 18" dia to meet codes), enlarge pit and gravel. perforate sides of new liner* to allow surface water to drain from interior surface of floor. add extensions to drains tiles from perimeter of house to enter pit. backfill with crushed stone and top off surface with finished cement. *one plumber will [u]perforate sides and bottom[/u] and provide 4” of crushed stone at bottom and about 2” on all sides. This company is a large (largest) well known area wide plumbing service. Because of the condition of my current pit a special quote had to be made vs their standard liner repalcements. *other quote will [u]only perforate the sides[/u] of liner and not the bottom, citing that debris and mud will accumulate at bottom due to sump sucking up from bottom. Will provide about 2” of crushed stone at bottom for liner to rest on. This company is a father/son company in business for over 20 years. He claims my collapse is perhaps the worst he has seen. Any opinion on which is better? Perforated bottom or not? At this point cost is not a factor.

I'll be installing a Big Blue whole house sediment filter in my girlfriend's house in the next week or so and noticed that not only is there a check valve on the main feed coming into the house from the well (prior to the pressure tank), but also another check valve (a dual check valve) just prior to the inlet of the acid neutralizer cylinder six feet away. I'm confused as to why a check valve would be needed here. Can I remove it?