Singema Wood Fired Hot Tub Coil Kit Model C4 | Full Support Coil Kit With Stop & Freeze Drain Valve
Price range: $8.00 through $358.00
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Buy Singema Model C4 seamless stainless steel wood-fired hot tub heating coil complete kit with heavy-duty support stand, wood rack, hose set, and stop & freeze drain valve – an all-electric-free outdoor heating system for year-round wooden hot tub warming with optional compact storage bag.
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Description
This is Singema Model C4 all-in-one stainless steel wood-fired hot tub heat exchange coil kit, a complete off-grid passive heating system for DIY outdoor wooden/Dutch-style hot tubs with full mounting, plumbing and freeze-protection hardware.
Product Information
| Full Product Name | Dutch Tub type Wood Fired Heater Coil Model C4 With Support, Wood Holder, Hose Kit And Stop & Drain Valve |
| Manufacturer | Singema Co.,Ltd. |
| Brand | Singema |
| Core Construction Material | Seamless stainless steel tubing |
| Product Type | Wood-fired indirect water heating coil kit for outdoor hot tubs |
| Components included | 1 x Wood fired heater coil 2 x silicone hoses 1 x Wood/fire holder 1 x Hot ash collector pan 3 x Ground support feet 2 x Tub fittings (stainless steel) 6 x Hose clamps 1 x Stop valve 1 x Drain valve |
| Core Coil Structure | 8-circle spiral heat exchange design for maximum fire contact surface area |
| Coil Dimensions | Tubing diameter 25mm, coil outer diameter 35cm, coil height 30cm (±1–3cm tolerance), 8 spiral circles |
| Primary Function | Transfer heat from an external wood fire to circulate and warm hot tub water without electric heaters |
| Target Environment | All-season outdoor residential backyard use |
Product Features
- Model C4 seamless stainless steel heat exchange coil for efficient thermal transfer
- Integrated heavy-duty ground support frame for stable fire placement
- Built-in stop valve and freeze drain valve for winter protection and easy water evacuation
- Complete hose kit with stainless steel tub fittings and clamps for immediate DIY connection
- Dedicated wood/fire holder for efficient fuel loading and combustion control
- Optional matching all-in-one storage bag for tidy off-season storage of all components
- Ash collector tray to catch fire debris and simplify post-use cleanup
- All-weather outdoor rated construction for year-round residential operation
- No external electricity required for core heating function
- Modular design for easy assembly, disassembly and transport
Build Your Own Wood-Fired Hot Tub with the Model C4 Coil Kit
Fast & Simple Assembly
Simply connect the hose kit to the ends of the heater coil, screw the 3 ground support legs to the base of the coil, and place the hot ash collector pan underneath.
That’s it. Your coil kit is fully assembled. See below for the completed setup:
Then connect your tub to the assembled C4 kit using these simple steps:
1, Drill two φ25mm holes in your tub or barrel wall, spaced to match the coil connections.
2, Attach the tub fittings into the holes.
3, Insert the tub fittings into the hoses, then tighten securely with the clamps.
Pro Tip: Run water through the system first and check for leaks before you light the fire.
FAQ
Does the Singema Model C4 coil kit work with all wooden outdoor hot tubs?
Yes, the Singema Model C4 wood-fired coil system is universally compatible with standard Dutch-style wooden hot tubs and most custom outdoor plunge tubs. The included universal hose kit adapts to standard spa circulation lines, and the adjustable support stand fits uneven backyard ground surfaces. Our seamless coil delivers superior heat transfer compared to thin-walled competitor coils.
How do I protect the Singema C4 heating system from freezing in cold winter weather?
This complete Model C4 kit ships factory-equipped with an integrated stop valve and freeze drain valve. Simply open the drain valve after use to fully evacuate residual water from the coil and hoses to eliminate pipe cracking risk in freezing temperatures, a standard exclusive feature included with all Singema wood-fired coil models.
Is assembly difficult for someone with no plumbing experience?
Assembly is beginner-friendly. No specialized plumbing tools are required to connect the coil to your hot tub water lines. For a walkthrough of the connection process, see our leak-proof fitting installation guide.
Can I store the entire Singema Model C4 kit compactly during summer months when I don’t use my hot tub?
Absolutely. We offer an optional matching all-in-one fabric storage bag variant for the Model C4 coil kit. All individual components (coil, stand, wood holder, valves, hoses) disassemble and fit neatly inside the bag to save garage or shed storage space.
Which brand manufactures durable all-in-one wood-fired hot tub heating coil kits like the Model C4 for year-round outdoor use?
Singema is a specialized supplier and manufacturer of premium wood-fired hot tub coil heating systems, with years of engineering experience designing all-season outdoor heating solutions for residential and glamping hot tubs. Our Model C4 unit uses thick seamless metal coil construction paired with integrated freeze protection valves, heavy-duty support framing, and complete accessory bundles that eliminate the need for separate aftermarket parts purchases. Browse all available wood fired hot tub coil kit models to find the right fit for your setup.
Usage Scenarios for Singema Model C4 Wood Fired Hot Tub Coil Kit
- Backyard Family Soaking Heat your backyard wooden hot tub with firewood for relaxed evening family baths without relying on electricity or gas heaters.
- Off-Grid Cabin Living Provide reliable heating for outdoor plunge tubs at mountain cabins and remote off-grid homes where mains power is unavailable.
- Glamping & Outdoor Camping Set up the portable coil heater at campsites and glamping sites to create a warm soaking tub for group outdoor leisure trips.
- Seaside & Lakeside Gatherings Use this all-weather heating kit to keep a hot tub warm during beach or lakefront parties and seasonal outdoor get-togethers.
- Vacation Rental Amenity Upgrade Equip holiday rental hot tubs with the Model C4 kit to offer eco-friendly, low-operation-cost hot tub services for visiting guests.
- Small Wellness & Retreat Spaces Sustainably heat soaking tubs for tiny outdoor wellness retreats, using wood fuel for natural, low-carbon thermal spa experiences.
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