Turn your K40 Boil Kettle into a HERMS HLT.
Everything that separates our K40 Boil Kettle from the K40 Hot Liquor Tank: the removable HERMS coil — about 11 m of 304 stainless tube, Ø240 mm, about 190 mm tall — and the two 1.5" Tri-Clamp threaded adapters that connect its ends to the kettle. It goes on the two lower front ports, 191 mm apart. Pump the mash liquor through the coil, and the hot liquor around it holds the mash on temperature — no direct heat on the grain.
Key points
- In the kit: 1× K40 HERMS coil + 2× HERMS coil fitting (1.5" Tri-Clamp threaded adapter)
- Not in the kit: 1.5" band clamps, gaskets and butterfly valves for the port connections — see the essentials below if you are short
- Fits the K40 kettle body — K40 Boil Kettle or K40 Hot Liquor Tank
- On a Boil Kettle: thermowell to the 45° port, coil on the middle and bottom front ports — the K40 HLT layout
- ~11 m of 304 stainless tube, 0.9 mm wall · Ø240 mm · ~190 mm tall
- Lifts out for cleaning — take it out and the kettle boils again
Specifications
| In the kit | 1× K40 HERMS coil · 2× HERMS coil fitting (1.5" Tri-Clamp threaded adapter) |
| Not in the kit | 1.5" band clamps + gaskets · 1.5" butterfly valves · pump · hoses |
| Fits | K40 kettle body (48.1 L) — Boil Kettle or Hot Liquor Tank |
| Coil | ~11 m · Ø240 mm · ~190 mm tall · 0.9 mm wall |
| Port spacing on the K40 | 191 mm (two lower front ports) |
| Material | 304 stainless steel |
| Coil weight | ≈2.5 kg |
FAQ
Do I need a pump?
Yes — HERMS means pumping the mash liquor through the coil. Our K40 systems use a 15R pump.
Can I still boil in the kettle?
Yes. Release the clamps, lift the coil out and it is a boil kettle again.
Buying new? The K40 Hot Liquor Tank comes with the coil as a complete set. Starting point: K40 Boil Kettle · More spare parts