Product Overview
The TP-220 is a 4-inch stainless steel butt clamp that seats at the butt joint between the primary combustion tube and the adjacent radiant tube section. Stainless steel construction is specified because this joint sits at the high-temperature combustion end of the tube assembly, where aluminized clamps are not rated. Detroit Radiant Products Co., the Warren, MI manufacturer behind the Re-Verber-Ray line, catalogs this part under alternate number 5173125; no third-party OEM equivalent has been identified in the available series manuals or submittal packages. Confirm the part number against the applicable series installation diagram before ordering, particularly when sourcing from a non-factory distributor.
The product listing carries no predecessor part number for the TP-220; the alternate number above is the only documented cross-reference. It fits 150-200 MBH configurations across the DX2, DX3L, HL2, HL3, LD3, LS3, MP3, HLV, and SV series, with 150-175 MBH models covered on some variants. The listing also references compatibility with RVA-2 high-BTU combustion chambers fitted with stainless steel tubes. See the Fitment panel for the full model-by-model breakdown.
The TP-220 ships as a single clamp, sold individually with no additional hardware included.
Before replacing this clamp, shut off the gas supply and disconnect power to the heater, and allow all tube surfaces to cool completely; combustion-end components retain heat after shutdown. Installation must be performed by a qualified technician following the applicable series installation manual. On 150-200 MBH burner models, the manual requires the clamp to be positioned precisely at the seam, with the exact location shown in the clamp-location diagram in each series manual; verify clamp position against that diagram and confirm operation before returning the heater to service. No dedicated TP-220 installation sheet is available; consult the relevant series manual (DX2, DX3L, HL2, HL3, LD3, LS3, MP3, HLV, or SV) for the clamp location diagram specific to your unit's BTU rating.
Specifications
| Material | Stainless Steel |
| Tube diameter | 4 in. |
| Clamp type | Butt clamp (joins two tube sections end-to-end at a seam) |
| Application / location | Located at seam between primary combustion chamber sections; required on high-BTU models (150-200 MBH). Used with high BTU combustion chambers -SS and RVA-2. |
| Voltage | N/A (non-electrical component) |
| Gas type | N/A (mechanical clamp; not a gas-path wetted component) |
| Alternate part number | 5173125 |
Cross-Reference & Fitment
| Alternate part numbers | 5173125 |
| Fits | DX2-SS, DX2-SS, DX2-SS, DX3L, DX3L, DX3L, DES3, DET3, GT3, GT, HL2-SS, HL2-SS, HL2-SS, HL3, HL3, HL3, HLV-150, HLV-170, HLV-175, HLV-180, HLV-200, LD3, LS3, MP3, RVA-2, SV, SV, SV |
