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Directory: Catalog > Heat Transfer Products (HTP) > Parts

Parts for Crossover Wall-Mounted Water Heaters

See the complete parts list with line art drawings to locate the part you need.

Part #	Description
7850P-023	Display Panel Cover
7850P-051	Overheat Switch (Heat Exchanger)
7850P-068	Top Wall Mount Bracket
7850P-081	Heat Exchanger Temperature Sensor (OP)
7850P-092	Bottom Wall Mount Bracket
7850P-210	Exhaust / Intake Gasket
7850P-237	Recirculation Pump
7850P-271	Ignition Transformer
7850P-279	Flow Check
7855P-002	Exhaust Duct Assembly
7855P-017	Condensate Block APS
7855P-025	Fan
7855P-029	Water Level Detection Sensor
7855P-031	Flame Sensor
7855P-031	Flame Sensor Cover
7855P-033	Gas Valve Inlet Adapter
7855P-043	Mixing Valve
7855P-043	Mixing Valve
7855P-044	P15 O-Ring
7855P-047	P18 O-Ring
7855P-066	Burner Overheat Switch
7855P-073	3/4 in. Pipe Gasket
7855P-076	Gas Valve O-Ring
7855P-083	DHW Flow Sensor
7855P-092	Exhaust Temperature Sensor
7855P-094	DHW Temperature Sensor
7855P-221	1/2 in. Gas Pipe Gasket
7855P-225	DHW Outlet Adapter
7855P-232	Gas Valve Outlet Adapter
7855P-246	1/2 in. Pipe Clip
7855P-251	DHW Inner Block
7855P-252	Ignitor Gasket
7855P-254	Exhaust Adapter O-Ring
7855P-256	Intake and Exhaust Adapter O-Ring
7855P-279	DHW Inlet Filter Block
7855P-281	Domestic Water Filter
7855P-283	DWH Inlet Block Cap
7855P-284	Filter Clips for DHW Block
7855P-335	Combination Analyzer Port Plug
7855P-349	Exhaust Temperature Sensor Clip
7855P-351	Exhaust Pipe Gasket - 150 Model
7855P-369	Air Damper Guide
7855P-371	Fan O-Ring
7855P-381	Gas Valve Assembly
7855P-382	Gas Inlet Adapter 3/4 in.
7855P-384	M3 X 6 PH + M/S
7855P-387	M4 X 8 TH + M/S
7855P-390	M4 X 10 TH + M/S
7855P-394	M4 X 14 PH + Self Taping
7855P-398	M4 Nut
7855P-399	M5 Nut
7855P-401	Sight Glass Assembly
7855P-406*	Control Board - 199 Model
7855P-407*	Control Board - 150 Model
7855P-418	Exhaust Pipe Gasket - 199 Model
7855P-419	Burner Gasket - 199 Model
7855P-420 (new # 7855P-438)	Ceramic Fiber Burner - 199 Model
7855P-424	Burner Inlet Channel (with Damper)
7855P-425	Fan Outlet Gasket
7855P-426	Burner Body Top Gasket
7855P-429	Air Intake Hose Top Clamp
7855P-430	Air Intake Hose
7855P-435	Gas Orifice - LP (6.2 mm), 199 Model
7855P-600	Display Panel
7855P-601	Air Pressure Sensor
7855P-603	Mixing Block
7855P-604	Recirculation Block
7855P-605	Condensate Trap Assembly
7855P-607	Ignition Rod
7855P-610	Gas Orifice - NG (8.3 mm), 199 Model
7855P-612 (no longer available)	Burner Refractory - 199 Model
7855P-614	HX Water Thermistor
7855P-615	Recirculation Water Sensor
7855P-617	DHW Temperature Sensor
7855P-618	Air Damper - 199 Model
7855P-634	Burner Gasket - 150 Model
7855P-635*	Ceramic Fiber Burner - 150 Model
7855P-636	Burner Refractory - 150 Model
7855P-645	Water Leak Detection Sensor
7855P-646	Burner Body - 150 Model
.

LP-590

Parts for Crossover Wall-Mounted Water Heaters

We are closing for Easter and Spring Break on Thursday, April 2, 2026 and will return on Monday, April 6, 2026.

All orders and emails will be held until we return to the office.