Will a 2” Pitless Adapter have enough clearance to install a 4” submersible pump in a 5” and 6” well casing?

Let’s start by addressing the 6” well casing first. Yes, both the Boshart PA-200NL (2” NL Bronze) and the P-200-SS (2” 304 Stainless Steel) Pitless Adapters leave clearance of 4.5” in diameter as shown in the diagram below. A standard 4” submersible pump will have sufficient clearance for the pump to pass by the slide inside the well casing when lowering the pump during installation. 

However, in a 5” well casing there is only 3.325” clearance, not enough for a 4” submersible pump to pass by the slide. The pump diameter would have to be limited to a 3” submersible pump.

INSTALLATION: In both 5” and 6” well casings, normal installation practices will not work for the 2" Pitless Adapters. The well casing diameter is too small to allow the slide to be lowered with the Pitless assembled and using the elbow and lift out connection. The diagrams below show the interference. The Pitless slide would need to lowered and inserted through the hole in the casing without the elbow attached. The 6” slide has a lot of clearance.

However, the slide has very little clearance in a 5” casing, depending on variation in well casing I.D. and machining tolerances it is possible that in some cases some grinding on the edges of the slide may be required to allow it to be lowered into the casing.    

CAUTION: This clearance information only applies to the BOSHART brand Pitless adapters, we cannot say whether a 4” pump will pass with other brands of 2” Pitless Adapters installed in 6” well casings.

SOLUTION: To install a 4” submersible pump in a 5” Well Casing a 5” x 2” Drop Pipe “Clear-Way” type Pitless is required. We can supply two types, Weld-On, & Clamp-On.