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Glowworm Heat Exchanger Washer O'Ring (178973 / 193535)
The Glowworm Heat Exchanger Washer O-Ring (Part Numbers: 178973 and 193535) is a high-grade hydraulic sealing component designed to handle the demanding heating and hot water cycles within specific Glowworm 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:
Glowworm Flexicom 18 HX — 41-315-42
Glowworm Flexicom 18 SX — 41-315-72
Glowworm Flexicom 24 CX — 47-047-33
Glowworm Flexicom 30 CX — 47-047-34
Glowworm Flexicom 30 SX — 41-047-76
Glowworm Flexicom 35 CX — 47-047-35
Glowworm Ultimate 24 H — 41-019-15
Glowworm Ultracom 24 CX — 47-019-06
Glowworm Ultracom 30 CX — 47-019-07
Glowworm Ultracom 24CXI — 47-019-01
Glowworm Ultracom 30CXI — 47-019-02
Glowworm Ultracom 38 CXI — 47-019-03
Glowworm Ultracom 18 SXI — 41-019-07
Glowworm Ultracom 30 SXI — 41-019-08
Glowworm Ultrapower 100SXI — 41-019-09
Glowworm Ultrapower SXI 170 — 41-019-10
Vaillant
A00961-4P
178973 193535
