Autotrol Adapter Kit, 155 (100a140-802)

The Autotrol Adapter Kit for the 155 valve, referenced 100a140-802, is a genuine Pentair service kit supplying the adapter hardware needed when installing or servicing an Autotrol model 155 control valve. Adapter kits like this one bridge the valve to the mineral tank or to the connecting plumbing, ensuring a proper, leak-free fit during a fresh installation, a relocation, or a repair.

Mounting a control valve to a tank or adapting it to a particular plumbing arrangement is one of those steps where having the exact right components makes the difference between a quick, clean install and a frustrating afternoon of leaks and improvised fittings. This kit provides the model-specific parts so the 155 valve seats correctly, threads cleanly, and seals as the manufacturer designed, which protects against weeping connections that can damage flooring and equipment over time.

• Genuine Pentair Autotrol adapter kit
• Fits Autotrol valve model 155
• Reference number 100a140-802
• Provides correct adapter hardware for installation and service
• Item weight: 0.06 lbs
• Helps ensure a proper, leak-free valve-to-tank connection

Good to know

Keeping the correct adapter kit on hand is smart for installers who service Autotrol equipment regularly, since adapter components are easy to lose during teardown and awkward to substitute. It is equally valuable for homeowners rebuilding, upgrading, or moving a softener, where the original hardware may be worn, cracked, or simply missing after years in service.

Because these components are matched to a specific valve, confirm your unit is an Autotrol 155 before ordering, and inspect the related o-rings and seals while you have the valve apart so you can address any companion wear in the same visit. With the right adapter kit installed, your water treatment system reassembles cleanly, seals reliably, and is ready to operate dependably for years to come. Having the proper kit also makes a relocation or upgrade far less stressful, since you are not improvising fittings on the spot or risking a mismatched seal that could leak weeks later. For homeowners tackling their first softener service, the reassurance of using the exact factory kit cannot be overstated, as it removes a major source of uncertainty and lets you focus on doing the rest of the job correctly.