18S model
is 18" long, 7" wide.
Ideal for a water tank size of up to 30 gallons.
24S model
is 24" long, 7" wide.
Ideal for a water tank between 30 gallons and 60 gallons.
16T model
is 16" long, 10" wide.
Ideal for a water tank size between 60 gallons and 100 gallons.
18TL model
is 18" long, 10" wide.
Ideal for a tank size between 80 gallons and 120 gallons. When a "straight" coil won't fit, this coil with its "L-shaped" nipples usually will.
21T model
is 21" long, 10" wide.
Ideal for a water tank size between 80 gallons and 120 gallons.
| model | WATER LOOP kit | HILKOIL kit | COMPLETE HILKOIL |
| S=Steel T=Twin Coil Steel L=Angle |
a Stainless Steel Hot Water Loop, mounting hardware, gaskets, Instructions, and Warranty. | everything in the WATER LOOP kit, plus a temperature/pressure Relief Valve | everything in the HILKOIL kit, plus a Holesaw |
| 18S | $ 158 |
$ 173 |
$ 188 |
| 24S | $ 168 |
$ 183 |
$ 198 |
| 16T | $ 178 |
$ 193 |
$ 208 |
| 18TL | $ 208 |
$ 223 |
$ 238 |
| 21T | $ 205 |
$ 220 |
$ 235 |