Brass Blow Out Plug with Schrader Valve | CAMCO-36153

Camco Brass Blow Out Plug with Schrader Valve | Part #36153 | Marine Plumbing Winterization

The Camco #36153 is the brass version of the standard blow out plug — built for boaters who want a more durable, corrosion-resistant fitting that will hold up to repeated use season after season. Thread it into your boat's city water inlet or plumbing blow-out port, connect your air compressor via the built-in Schrader valve, and push compressed air through your freshwater lines to clear standing water before antifreeze winterization. Brass construction handles air pressure with confidence and resists the moisture and salt exposure common in marine environments far better than plastic.

Part Details:

• Part Number: 36153
• Manufacturer: Camco
• Type: Blow Out Plug with Schrader Valve
• Material: Brass — corrosion-resistant, durable under air pressure
• Connection: Schrader valve — compatible with standard air compressor fittings
• Installation: Hand-tighten, no tools required
• Use: Clearing standing water from marine freshwater plumbing lines prior to antifreeze winterization
• Condition: New

Additional Information

Brass vs. Plastic Blow Out Plug — Which Should You Choose:

Both the Camco 36103 (plastic) and the 36153 (brass) do the same job — thread into your water inlet and provide a Schrader valve connection for compressed air blow-out. The difference comes down to durability and environment:

• Brass construction — holds up to higher air pressure without deformation, resists corrosion from moisture and saltwater exposure, and lasts longer with repeated seasonal use
• Better grip under pressure — the brass body provides a more secure thread engagement than plastic, reducing the risk of blow-out under sustained air pressure
• Long-term value — at $6.95 vs. $3.95 for the plastic version, the brass plug is the smarter choice for boaters who winterize annually and want a fitting that lasts
• Marine-grade durability — brass is the preferred material for marine plumbing fittings precisely because it resists the corrosive environment of the bilge and dock

How to Use the Camco 36153 for Marine Winterization:

1. Shut off the water supply and open all faucets and valves to release system pressure
2. Thread the Camco 36153 into your boat's city water inlet or blow-out port by hand until snug
3. Connect your air compressor to the Schrader valve fitting
4. Apply compressed air at 30–40 PSI and open each faucet or fixture one at a time to blow water through and out
5. Once only air exits each fixture, close it and move to the next
6. Follow with antifreeze pump-through for complete freeze protection

Frequently Asked Questions

1. What's the advantage of brass over the plastic blow out plug?
Brass handles air pressure more reliably than plastic, resists corrosion better in marine environments, and holds up to repeated seasonal use without cracking or deforming. If you winterize your boat annually and want a fitting that will last for years, the brass 36153 is the better long-term choice over the plastic 36103.

2. What pressure should I use when blowing out marine plumbing lines?
Use 30–40 PSI for most marine freshwater plumbing systems. This is sufficient to clear standing water from lines without risking damage to fittings, valves, or flexible hose. Never exceed the pressure rating of the lowest-rated component in your plumbing system.

3. Does this fit my boat's city water inlet?
The Camco 36153 is designed to fit standard city water inlet fittings commonly found on boats with pressurized freshwater systems. Verify your inlet thread size before ordering. Contact us at MacombMarineParts.com if you need help confirming fitment.

4. Do I still need antifreeze after blowing out the lines?
Yes — compressed air removes the bulk of standing water but cannot guarantee every fitting, valve body, and low point is completely dry. Always follow blow-out with antifreeze pump-through for complete freeze protection, especially in climates where temperatures drop below 20°F.