NEW Evoqua Diamond S Plus / MonoAir

Unused surplus Evoqua Water Technologies/Envirex PVC retaining rings for 9-inch Diamond S Plus and MonoAir fine-bubble diffuser assemblies.

These retaining rings are identified as component B in the manufacturer’s MonoAir single-pod diffuser assembly. The ring threads onto the diffuser saddle and secures the EPDM membrane disc in position.

The retaining rings are manufactured from PVC conforming to ASTM D-3915, Compound 124524, with a minimum 2% titanium-dioxide content. They were originally furnished as part of a fine-bubble aeration system for a municipal wastewater treatment facility but were placed into warehouse storage.

This listing is for the PVC retaining rings only. EPDM membrane discs, diffuser saddles, piping, tightening tools and other diffuser-grid components are not included unless specifically shown in the photographs.

Multiple retaining rings are available. Buyer is responsible for confirming dimensions and compatibility with the intended 9-inch diffuser pod or holder before purchasing.