the Ultra-Drain Seal Plus (page 43) should be considered

Model #5KS405LAA208

Includes Polyethylene Work Surface on Top with a Slightly Raised Curved Edge to Contain Spills

Small O-Rings

Bradley S45-977 Pf-1031 4-8W Ppk Replacement Part

Parker Check Valve, 1/4 in, Single, Inline Poppet, Brass, Compression x Compression - 4A-C4L-10-BN-B Manual Roll Paper Towel Dispensers the Ultra-Drain Seal Plus (pageInstrumentation Check Valves, Cracking pressure: 10 psi,Provide unidirectional flow control of fluids and gases. Blowout resistant seat design. Machined backstop reduces spring stress. Stainless steel check valves have fluorocarbon seats. Brass check valves have nitrile rubber seals. Compression connections.,Brass, 3000 psig CWP Temp. range: 30 to 275F