
Hydrotherm BM-3318 Pilot Tube
The Hydrotherm BM-3318 Pilot Tube is a mission-critical OEM replacement part designed for standing pilot assemblies in high-efficiency Hydrotherm boilers and commercial heating units. Constructed from heavy-duty brass or stainless steel, this 12-inch gas pilot line ensures a steady, regulated fuel flow to the pilot burner, maintaining the precise pilot flame signal required for reliable main burner ignition. Engineered to withstand high-pressure environments up to 500 psi and temperatures reaching 250°F, the BM-3318 is built to resist thermal fatigue and corrosion in demanding boiler rooms.
For service contractors, this pilot tubing kit includes the necessary compression fittings to provide a leak-proof seal, preventing the common "no-heat" calls associated with restricted or damaged pilot lines. Whether you are performing routine boiler maintenance or a full standing pilot assembly overhaul, using genuine Hydrotherm heating parts ensures exact HVAC compatibility and optimal millivolt output from the thermocouple or thermopile. This part is a direct fit for various industrial heating systems and fluid distribution networks where ignition reliability and system safety are non-negotiable.
Key Benefits- Direct OEM Fit: Ensures seamless integration with existing Hydrotherm boiler burner assemblies without the need for field modifications.
- High-Durability Construction: Formed from corrosion-resistant materials to handle the extreme heat cycles of a 24/7 commercial hydrotherm boiler.
- Optimized Gas Flow: Maintains the correct fuel-to-air mixture for a stable pilot flame, reducing carbon buildup and pilot outages.
- Universal Fittings included: Comes with pre-installed or included specialized fittings for a secure, high-pressure connection to the gas valve.
What causes a pilot tube to fail?
Over time, pilot tubes can become restricted by soot, scale, or moisture in the gas line. If you notice a weak or orange pilot flame, the tube or orifice may be partially clogged, necessitating a replacement to restore the correct pilot ignition sequence.
Can I use a generic soft copper tube instead of the BM-3318?
While generic tubing exists, the Hydrotherm BM-3318 is specifically rated for higher pressure (500 psi) and comes with the exact flare or compression specs required for Hydrotherm manifolds, ensuring a gas-tight seal that generic alternatives may not provide.
Is this compatible with both Natural Gas and LP systems?
Yes, the pilot line itself is compatible with both fuel types, provided it is connected to the correct pilot orifice and gas valve configuration for the specific application.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $30.81
-65%$30.81
$10.78Hydrotherm BM-3318 Pilot Tube
The Hydrotherm BM-3318 Pilot Tube is a mission-critical OEM replacement part designed for standing pilot assemblies in high-efficiency Hydrotherm boilers and commercial heating units. Constructed from heavy-duty brass or stainless steel, this 12-inch gas pilot line ensures a steady, regulated fuel flow to the pilot burner, maintaining the precise pilot flame signal required for reliable main burner ignition. Engineered to withstand high-pressure environments up to 500 psi and temperatures reaching 250°F, the BM-3318 is built to resist thermal fatigue and corrosion in demanding boiler rooms.
For service contractors, this pilot tubing kit includes the necessary compression fittings to provide a leak-proof seal, preventing the common "no-heat" calls associated with restricted or damaged pilot lines. Whether you are performing routine boiler maintenance or a full standing pilot assembly overhaul, using genuine Hydrotherm heating parts ensures exact HVAC compatibility and optimal millivolt output from the thermocouple or thermopile. This part is a direct fit for various industrial heating systems and fluid distribution networks where ignition reliability and system safety are non-negotiable.
Key Benefits- Direct OEM Fit: Ensures seamless integration with existing Hydrotherm boiler burner assemblies without the need for field modifications.
- High-Durability Construction: Formed from corrosion-resistant materials to handle the extreme heat cycles of a 24/7 commercial hydrotherm boiler.
- Optimized Gas Flow: Maintains the correct fuel-to-air mixture for a stable pilot flame, reducing carbon buildup and pilot outages.
- Universal Fittings included: Comes with pre-installed or included specialized fittings for a secure, high-pressure connection to the gas valve.
What causes a pilot tube to fail?
Over time, pilot tubes can become restricted by soot, scale, or moisture in the gas line. If you notice a weak or orange pilot flame, the tube or orifice may be partially clogged, necessitating a replacement to restore the correct pilot ignition sequence.
Can I use a generic soft copper tube instead of the BM-3318?
While generic tubing exists, the Hydrotherm BM-3318 is specifically rated for higher pressure (500 psi) and comes with the exact flare or compression specs required for Hydrotherm manifolds, ensuring a gas-tight seal that generic alternatives may not provide.
Is this compatible with both Natural Gas and LP systems?
Yes, the pilot line itself is compatible with both fuel types, provided it is connected to the correct pilot orifice and gas valve configuration for the specific application.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Hydrotherm BM-3318 Pilot Tube is a mission-critical OEM replacement part designed for standing pilot assemblies in high-efficiency Hydrotherm boilers and commercial heating units. Constructed from heavy-duty brass or stainless steel, this 12-inch gas pilot line ensures a steady, regulated fuel flow to the pilot burner, maintaining the precise pilot flame signal required for reliable main burner ignition. Engineered to withstand high-pressure environments up to 500 psi and temperatures reaching 250°F, the BM-3318 is built to resist thermal fatigue and corrosion in demanding boiler rooms.
For service contractors, this pilot tubing kit includes the necessary compression fittings to provide a leak-proof seal, preventing the common "no-heat" calls associated with restricted or damaged pilot lines. Whether you are performing routine boiler maintenance or a full standing pilot assembly overhaul, using genuine Hydrotherm heating parts ensures exact HVAC compatibility and optimal millivolt output from the thermocouple or thermopile. This part is a direct fit for various industrial heating systems and fluid distribution networks where ignition reliability and system safety are non-negotiable.
Key Benefits- Direct OEM Fit: Ensures seamless integration with existing Hydrotherm boiler burner assemblies without the need for field modifications.
- High-Durability Construction: Formed from corrosion-resistant materials to handle the extreme heat cycles of a 24/7 commercial hydrotherm boiler.
- Optimized Gas Flow: Maintains the correct fuel-to-air mixture for a stable pilot flame, reducing carbon buildup and pilot outages.
- Universal Fittings included: Comes with pre-installed or included specialized fittings for a secure, high-pressure connection to the gas valve.
What causes a pilot tube to fail?
Over time, pilot tubes can become restricted by soot, scale, or moisture in the gas line. If you notice a weak or orange pilot flame, the tube or orifice may be partially clogged, necessitating a replacement to restore the correct pilot ignition sequence.
Can I use a generic soft copper tube instead of the BM-3318?
While generic tubing exists, the Hydrotherm BM-3318 is specifically rated for higher pressure (500 psi) and comes with the exact flare or compression specs required for Hydrotherm manifolds, ensuring a gas-tight seal that generic alternatives may not provide.
Is this compatible with both Natural Gas and LP systems?
Yes, the pilot line itself is compatible with both fuel types, provided it is connected to the correct pilot orifice and gas valve configuration for the specific application.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.











