Raypak Hydronic Heaters Temperature & Pressure Gauge Kit (007399F) productsunlimited and this Filbur FC-3091 cartridge

and this Filbur FC-3091 cartridge is designed for C-5621 and PTL25 applications

Helps restore accurate system temperature monitoring

Useful when the original lower body is cracked or worn

Bulkhead fittings help connect plumbing through tanks and vessels while maintaining a sealed pass-through under operating pressure

A properly selected replacement helps preserve the intended internal debris-control role instead of forcing the repair to rely on a substitute that only partly fits

Raypak Hydronic Heaters Temperature & Pressure Gauge Kit (007399F) productsunlimited and this Filbur FC-3091 cartridgeThe Raypak temperature and pressure gauge kit is designed for compatible hydronic heater applications where the supported monitoring components need replacement. A gauge kit is useful because it helps restore a more complete temperature and pressure reading solution rather than replacing only one part of the monitoring setup. This replacement is especially useful when the original gauges are leaking, inaccurate, fogged, or no longer readable. Using