I am in process of replacing an 18" dia. x 30" deep pit that was installed in basement when house was built. The idea was this would be used for future basement finish complete with full bathroom installation. After living here for 10 years, my wife introduced me to the future and said she wants the basement finished!
I purchased a system composed of a Little Giant 2HP 230v sewage grinder pump (very impressive demonstration video on youtube sold me) and Jackel spiral wound fiberglass pit, 24" dia. x 48" deep. Pit has a 32" dia. anti floatation flange around bottom and same size flange around top. Concrete is placed over bottom flange after installation in 54" deep dug hole that has been backfilled with 6" of pea gravel. Concrete must add enough weight to keep pit from floating if there is a water table issue.
I have many questions.
I have read many sites before purchase and many sites after purchase. What I am noticing after I bought this system is the pits with the flange may be for outdoor installation. Does this make any difference? I am installing under stairway to basement. The so called indoor systems utilize smaller pits with less depth. The excavation work to 54" depth has turned into quite an undertaking. But if the larger pit is ok, I plan on continuing the Big Dig to China to install this thing.
The pit comes with 1 1/4" threaded PVC adaptor installed through wall of pit. Does the 1 1/4" PVC pipe just turn up via a 90 degree bend just outside of pit and extend up through concrete floor that will be poured back around top of pit?
There is no hole in side of pit to receive the 3" sewage drain pipe from bath. Is this as simple as hole sawing an appropriate size hole through fiberglass pit and use a rubber adaptor seal for 3" PVC pipe that has a big nut on inside that will tighten and compress rubber doughnut against pipe for seal?
The lid is appears to be a PVC material or a composite material with a checkerplate surface and no holes. This pit should be vented. To vent, would this also be a simple hole sawing of cover to accommodate an appropriate size rubber adaptor, minimum 1 1/2" PVC vent pipe?
Does it make any difference that the existing 3" PVC drain line from bathroom under concrete floor has an invert elevation 12" down from surface of concrete floor and that the 1 1/4" exit pipe that will come from pump through existing factory installed adaptor in wall of fiberglass pit has an invert at 20" below concrete floor? The inlet drain is higher than the outlet pressurized pipe.
Should pit be positioned relative to the 3" PVC inlet drain so as not to be pouring directly on pump? Would solids build up and cake on pump if solids hit pump direct?
Thanks to all for any answers provided.
Rick
I purchased a system composed of a Little Giant 2HP 230v sewage grinder pump (very impressive demonstration video on youtube sold me) and Jackel spiral wound fiberglass pit, 24" dia. x 48" deep. Pit has a 32" dia. anti floatation flange around bottom and same size flange around top. Concrete is placed over bottom flange after installation in 54" deep dug hole that has been backfilled with 6" of pea gravel. Concrete must add enough weight to keep pit from floating if there is a water table issue.
I have many questions.
I have read many sites before purchase and many sites after purchase. What I am noticing after I bought this system is the pits with the flange may be for outdoor installation. Does this make any difference? I am installing under stairway to basement. The so called indoor systems utilize smaller pits with less depth. The excavation work to 54" depth has turned into quite an undertaking. But if the larger pit is ok, I plan on continuing the Big Dig to China to install this thing.
The pit comes with 1 1/4" threaded PVC adaptor installed through wall of pit. Does the 1 1/4" PVC pipe just turn up via a 90 degree bend just outside of pit and extend up through concrete floor that will be poured back around top of pit?
There is no hole in side of pit to receive the 3" sewage drain pipe from bath. Is this as simple as hole sawing an appropriate size hole through fiberglass pit and use a rubber adaptor seal for 3" PVC pipe that has a big nut on inside that will tighten and compress rubber doughnut against pipe for seal?
The lid is appears to be a PVC material or a composite material with a checkerplate surface and no holes. This pit should be vented. To vent, would this also be a simple hole sawing of cover to accommodate an appropriate size rubber adaptor, minimum 1 1/2" PVC vent pipe?
Does it make any difference that the existing 3" PVC drain line from bathroom under concrete floor has an invert elevation 12" down from surface of concrete floor and that the 1 1/4" exit pipe that will come from pump through existing factory installed adaptor in wall of fiberglass pit has an invert at 20" below concrete floor? The inlet drain is higher than the outlet pressurized pipe.
Should pit be positioned relative to the 3" PVC inlet drain so as not to be pouring directly on pump? Would solids build up and cake on pump if solids hit pump direct?
Thanks to all for any answers provided.
Rick