- CUSTOM FILL ADAPTER for PCP MODELS & 22XX BULK-FILL CONVERSION
CUSTOM FILL ADAPTER for PCP MODELS & 22XX BULK-FILL CONVERSION
Please read our TUBE DEFECTS page for details about wall thickness and threading issues with some 22XX tubes.
THIS ADAPTER DOES NOT FIT DON COTHRAN TUBES AND MAY NOT FIT CUSTOM TUBES MADE BY OTHERS. IT'S SPECIFICALLY DESIGNED TO FIT CROSMAN/BENJAMIN TUBES WHICH HAVE MUCH LOOSER-FITTING THREAD TOLERANCES. THE THREADS ARE CUT SLIGHTLY OVER-SIZED TO FIT CROSMAN TUBES SNUG FOR INCREASED SAFETY AT HIGHER OPERATING PRESSURES.
This adapter should be installed by hand only, no tools should be used. The threads are cut to fit snug for increased strength. Due to manufacturing variances at Crosman, some tubes fit tighter than others. For safety reasons these adapters are designed to fit well with looser-fitting tubes. Some tubes will be a tight fit but should go in by hand. The adapter should be well lubricated, the threads on the adapter and in the tube should be very clean, otherwise the adapter may bind. On rare occasions a tube will be extremely tight and simply won't fit. In that case you can ship the tube to us to have the threads reworked. The other option is to buy a tube and adapter together so we can make sure they fit correctly. This is an issue caused by Crosman's loose manufacturing standards. We're dedicated to making parts that are as safe as possible, we'd rather sell an adapter that fits too tight in some cases than one that leaves room for a possible failure.
With this adapter 3000-3300 PSI is the safe limit for Crosman / Benjamin 7/8" OD tube assemblies if three of our custom valve screws are correctly installed to reinforce the valve. Otherwise you should only use the pressure the manufacturer suggests.
It fits all Crosman / Benjamin 7/8" OD tubes. This includes Discovery, Maximus, Challenger, Marauder Pistol, 1701P, 1720T, 2240, 2250, 2260, 2300T, 2300S, 2300KT, 2400KT and similar models with tubes threaded inside the front. Models that operate on 12 gram CO2 cartridges require additional upgrades to convert to bulk-fill, PCP or HPA.