Suburban Water Heater Gas Valve | 525042 / 161109 | SW Series 953+

Restore reliable gas flow to your Suburban RV water heater with the Suburban 525042 Gas Valve. This genuine Suburban OEM replacement LP propane gas valve regulates propane flow to the main burner on SW Series water heaters — ensuring consistent ignition and stable flame quality. When the valve gets weak, sticks, or fails entirely, water heater symptoms include difficulty lighting, flame drop-out, and unstable flame behavior.

For SW Series Water Heaters — Serial Numbers Starting with 953

The 525042 is specifically engineered for Suburban SW Series water heaters with serial numbers starting with 953. This includes common applications on the:

• SW6
• SW10
• SW12 (including SW12DE)
• SW16

D, DE, DEL, and DEM variants of these models are typically compatible. Verify your existing water heater's serial number prefix matches before ordering — using the wrong valve for your serial range can cause incompatibility or improper operation.

Different SW Serial Range? See the 161306

If your SW Series water heater has a serial number starting with 164 (rather than 953), the correct gas valve is the Suburban 161306 Gas Valve instead — different fitment for the newer SW Series serial range. Always match the valve to your water heater's specific serial number range before ordering.

Cross-Reference: 525042 = 161109

This valve is sometimes listed under cross-referenced part number 161109. Both 525042 and 161109 refer to the same gas valve — either part number may appear depending on the supplier or service manual. If you're cross-referencing from documentation showing 161109, this 525042 is the matching product.

Why Replace the Gas Valve?

If your water heater is struggling to light, dropping out mid-cycle, or showing unstable flame characteristics — and you've already verified that the igniter and flame sensor are working correctly — a weak or sticking gas valve is the proper next fix. Common gas valve failure symptoms:

• Hard ignition — water heater struggles to light
• Flame drop-out — burner extinguishes mid-cycle
• Unstable flame — flickering or inconsistent flame quality
• Valve doesn't close when commanded — gas continues flowing after shutdown
• Repeated ignition lockout

Connection Specifications

• Inlet: 3/8" NPT
• Outlet: 1/4" Loxit (to SW burner assembly)
• Control Voltage: 12V DC (controlled by the water heater's main board)
• Fuel: LP propane only
• Supply Pressure: Use with a regulator providing 11" WC propane supply

Installation Overview

1. Shut off LP at the tank and disconnect 12V supply to the water heater
2. Remove the access door; label and disconnect the wiring and LP lines
3. Swap the valve, using approved thread sealant on NPT connections (NOT on flare seats)
4. Reconnect wiring per the original configuration
5. Leak-test all joints with approved leak detection solution
6. Restore power and LP; test ignition and confirm steady blue flame

Pro Tip: Inspect the Burner Tube Too

Whenever you replace the gas valve, also inspect and clean the burner tube and verify the orifice size for your altitude. A carboned-up burner can cause rough ignition that looks like a valve problem but isn't. If the burner tube or orifice needs replacement, Suburban part 010843 is the matching burner tube with orifice for SW Series water heaters.

Paired Component — SW Series Module Board

The gas valve works hand-in-hand with the water heater's control module board. The matching SW Series module board is the Suburban 520814 Ignition Control Module Board — Direct Spark Ignition control board with wide compatibility across SW4, SW6, SW10, SW12, and SW16 models. Both components often fail together, so if one has worn out, the other may be next.

⚠️ Professional Installation Required

Gas valves should be installed and tested by a qualified service technician. Improperly installed propane components are a fire and explosion risk. Always pressure-test connections after installation.

Need to Troubleshoot or Replace Your Water Heater?

If you're weighing whether to repair your existing water heater or replace it entirely, our resource guides may help:

• How to Replace an RV Water Heater — full water heater replacement guide
• Tankless vs Tank RV Water Heaters — if you're considering upgrading to tankless

Related Parts

• Burner Tube + Orifice: Suburban 010843 — pair when carboning or burner damage is found during valve replacement
• 120V Electric Heating Element: Suburban 520900 — for SW models with electric heat capability
• Anode Rod for SW steel tanks — regular replacement for tank longevity

What's Included

• (1) Suburban 525042 LP gas valve assembly
• Valve bracket/ports as supplied by factory
• Basic install guidance (model dependent)

Key Features

• Genuine Suburban OEM LP propane gas valve
• For Suburban SW Series water heaters (D, DE, DEL, DEM variants) with serial numbers starting with 953
• 3/8" NPT inlet × 1/4" Loxit outlet
• 12V DC control (board-controlled)
• Direct replacement — no adaptations required
• Stable flame control — correct pressure and flow for reliable ignition
• Cross-reference: 525042 and 161109 are the same valve
• Service-friendly standard NPT connections
• Backed by a 90-day manufacturer warranty

Specifications

• Brand: Suburban
• Part Number: 525042 (also cross-referenced as 161109)
• Type: LP Gas Valve for Water Heater
• Application: Suburban SW Series water heaters with serial numbers starting with 953
• Compatible Models: SW6, SW10, SW12 (including SW12DE), SW16 (D/DE/DEL/DEM variants)
• Fuel: Propane (LP)
• Inlet: 3/8" NPT
• Outlet: 1/4" Loxit (to SW burner assembly)
• Control Voltage: 12V DC (board-controlled)
• Required Supply Pressure: 11" WC propane supply (via regulator)
• Sibling Part (for 164+ serial): Suburban 161306
• Warranty: 90-day manufacturer warranty