Ferroli Heat Exchanger O'rings 39841660

Ferroli Heat Exchanger Washer O-Ring (39841660) The Ferroli Heat Exchanger Washer O-Ring (Part Number: 39841660) is a high-grade hydraulic sealing component designed to handle the demanding heating and hot water cycles within specific Ferroli domestic boilers. Made from premium, heat-resistant EPDM rubber, these O-rings provide a perfectly watertight and leak-proof seal at the primary and secondary plate heat exchanger ports. They prevent internal pressure drops, dripping, and cross-contamination between the heating circuit and domestic hot water supply. High Thermal Stability: Engineered from premium elastomeric compounds that expand and contract reliably under continuous high-temperature shifts without weakening or tracking. Leak & Drop Prevention: Directly eliminates small interface drips and structural pressure drops that occur when original seals flatten or turn brittle over time. Flawless Manifold Seating: Dimensioned precisely to lock cleanly into the hydraulic group seating tracks, reducing the risk of seal distortion or pinching during tightening. Compatible Models Ferroli Optimax HE 31C — 39841660 Ferroli Optimax HE 38C — 39841660 Ferroli Optimax HE Plus 31C — 39841660 Ferroli Optimax HE Plus 38C — 39841660 Ferroli Optimax HE 25S — 39841660 Ferroli Optimax HE 31S — 39841660 Ferroli Optimax HE Plus 18S — 39841660 Ferroli Optimax HE Plus 25S — 39841660 Ferroli Optimax HE Plus 35S — 39841660 Ferroli Optimax HE Plus 18 OV — 39841660 Ferroli Optimax HE Plus 25 OV — 39841660 Ferroli Domicondens F 24 — 39841660 Ferroli Domicondens F 28 — 39841660 Ferroli Domiproject D F24 — 39841660 Ferroli Domina F24 N — 39841660 Ferroli FerEasy D — 39841660 Ferroli A01090-01