P-100 and P-100NL Pitless Adapter Replacement Parts
The diagram below details the replacement parts for the discontinued model P-100 Bronze Pitless Adapter. The new part number is P-100NL (No-Lead Bronze Pitless Adapter).
Note: The O-ring size is 222 and is a readily available, “off the shelf” O-ring made to AS568 North American Standard. The O-ring part number is 09-P-100-OR-222 and the gasket kit part number is 09-P-100-RGK.
For easy identification, the O-ring size number 222 was molded on the Pitless elbow casting in 2002. If you have an older model, it will not have an O-ring number molded on the casting.


NOTE: P-100 and P-100NL parts are not interchangeable with the PA-100 and PA-100NL Pitless Adapters!
Additional Resources:
https://support.boshart.com/how-do-i-properly-install-my-pitless-adapter
https://support.boshart.com/what-is-the-working-pressure-for-slide-type-pitless-adapters
https://support.boshart.com/what-is-the-function-of-pitless-adapters-in-a-well-water-system
https://support.boshart.com/how-did-the-pitless-adapter-get-its-name