Deep Well 2.5″ Standard Cylinder Maintenance Kit – Revision A Manufactured between May 2011 and 2013

SKU 55-200-0-23-01 Category
DescriptionQtyPart Number
A) #6 x 3/8” Phillips Head Screw1204-000-1-45-22
B) Check Valve204-000-5-75-02
C) Piston Cup Seal204-002-3-71-04
D) Internal Retaining Ring204-022-1-68-05
E) End Cap O-Ring404-139-3-70-01
F) O-Ring Pick Tool155-001-0-07-00

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This maintenance kit is for 2.5” standard cylinders manufactured between May 2011 and 2013. These have screw-in style piston check valves that are no longer produced. Therefore, these items are not included in the maintenance kit. If the screw-in style check valve needs replaced, then a current version of the piston assembly would have to be purchased. This cylinder also uses a separate foot valve which is included with the maintenance kit.

With this maintenance kit you will be able to replace most wear items and some hardware to keep your Bison Pump Cylinder running strong!

Bison Pumps offers an upgrade kit that would convert most cylinders to the latest model. For more details visit Cylinder Upgrade Kits.


Design and Construction

  • Replacements for all wear items
  • Additional stainless-steel hardware in case of loss
  • O-Ring Pick Tool to assist in uninstall/install of cup seals and O-rings



  • Contact us directly for instructions


Related parts:


This maintenance kit works with these pumps: