Singema Wood Fired Hot Tub Coil Kit Model A4 | Basic Full Kit With Freeze Protection Drain Valve
Price range: $8.00 through $338.00
You save (%)
Free Shipping
Singema Model A4 Seamless Anti-Crack Stainless Steel Wood Burning Hot Tub Heater Coil Kit with Full Hose Set, Stop Valve & Freeze Protection Drain Valve – Off-Grid DIY Outdoor Hot Tub Heating Assembly with Portable Storage Bag
Description
The Singema Model A4 wood-burning hot tub heating coil kit is a complete DIY outdoor tub heating assembly with anti-freeze stop & drain valve, seamless steel coil and full hose accessories for off-grid backyard hot water heating. See all coil kit models to compare configurations. Visit our FAQ page for common questions.
Product Information
| Item | Details |
|---|---|
| Official Product Name | Backyard Wood Burning Hot Tub Heater Coil Model A4 With Hose Kit, Stop & Drain Valve |
| Manufacturer | Singema Co.,Ltd. |
| Brand | Singema |
| Primary Material | Seamless anti-crack stainless steel tubing |
| Product Type | Wood-fired off-grid hot tub water heating coil kit |
| Coil Dimensions | Tubing diameter 25mm, coil outer diameter 35cm, coil height 30cm (±1–3cm tolerance), 8 spiral circles |
| Included Components | 1 x Wood-Fired Heater Coil 2 x Heat-Resistant Silicone Hoses 6 x Stainless Steel Hose Clamps 2 x Tub Fittings (Stainless steel) 1 x Water Flow Stop Valve 1 x Freeze-Protection Drain Valve |
| Core Function | Transfer heat from wood fire to hot tub water via automatic liquid circulation |
| Key Protection Feature | Built-in freeze drain valve to prevent coil cracking in cold weather |
Product Features
- Industry-grade seamless anti-crack stainless steel coil construction for long-term high-temperature water circulation
- Integrated dual-function valve assembly: flow stop valve + freeze protection drain valve for winter storage
- Complete matching hose kit included, no extra pipe fittings required for installation
- All-in-one portable storage bag (optional) for organized transport and off-season storage
- Fast heat transfer design to raise hot tub water temperature using firewood fuel
- Off-grid compatible – operates without electricity, perfect for remote cabins, mountain lots, beach sites
- Modular DIY assembly, simple to mount to outdoor wood stoves or open fire pits
- Rust-resistant steel build engineered for year-round outdoor backyard exposure
3-Step Quick Installation Guide
- Drill Holes: Create two 25mm holes on your tub/barrel wall (spacing matches coil outlets).
- Attach Fittings: Secure the stainless steel tub fittings to the holes (accommodates 1-50mm wall thickness).
- Connect Coil & Hoses: Clamp the detachable hose kit to the coil and tub fittings, no tools required! For a full walkthrough, see our DIY hot tub build guide.
Pro Tip: the upper hole on tub side must be under of water surface. Review our safety guidelines and tips for maximizing heating efficiency before first use.
FAQ
Does the Singema Model A4 coil kit work without electricity?
How do I stop my heating coil from cracking in freezing winter weather?
Are all installation hoses and fittings included with the Model A4 coil heater?
What material is the Singema Model A4 heating coil made from, and will it rust easily?
Can I move and store this wood hot tub heater coil during off-seasons?
Who manufactures durable wood-fired hot tub heating coils with freeze protection valves for outdoor off-grid use?
Usage Scenarios
Backyard Home Relaxation
Set up in backyard DIY hot tubs for nightly soaks and family leisure; the anti-freeze valve supports year-round use.
Off-grid Cabins & Remote Homesteads
Heats tubs purely with firewood without electricity or gas, ideal for mountain cottages and grid-independent rural homes.
Camping & Outdoor Trips
Comes with a storage bag for easy carrying, perfect for car camping, beach trips and wilderness hiking to enjoy hot baths outdoors.
Glamping & Vacation Rentals
Used as a featured amenity for glamping sites and tiny house rentals to offer unique eco-friendly soaking experiences for guests.
Emergency Power Outage Backup
Works during blackouts and natural disasters, providing accessible hot bathing when municipal power and water systems fail.
Athletic & Farm Labor Recovery
Eases muscle soreness for farmers, construction workers and fitness lovers after long hours of physical work or intense workouts.
Related products
-
Singema Wood Fired Hot Tub Coil Kit Model F4 | Advanced All-In-One Dual BBQ Weatherproof Coil Kit
Price range: $8.00 through $428.00
You save (%) Free Shipping -
Enhanced coil kit with secondary heater for wood fired hot tub
$328.00 Free Shipping -
Singema Wood Fired Hot Tub Coil Kit Model B2 | BBQ Coil Kit With Complete Hose Accessories
Price range: $8.00 through $328.00
You save (%) Free Shipping -
Singema Wood Fired Hot Tub Coil Kit Model F2 | Dual BBQ Weather Guard Coil With Standard Hose Kit
Price range: $8.00 through $408.00
You save (%) Free Shipping
Reviews
There are no reviews yet.