Heating Domestic
Hot Water for your Home with a
Wood Boiler

This first section if for traditional outdoor boilers with 2 Pex lines.

Side arm Heat Exchanger

The side-arm is narrow and is easily mounted to the side of your existing hot water heater, usally at existing fittings such as your drain and pop-up valve with the other two pipes running to your boiler that does NOT have a built-in heat exchanger, such as Hardy and Hyprotherm Furnace

Plate Exchanger for Domestic Hot Water

Simple to install using Pex or existing copper pipe and push fit fittings.

Mixing or anti-scald valve

VERY IMPORTANT! Needed so your kids and guests (or you) don't scald your hands because both of the heat exchangers can produce hot water up to 180F

3/4" Mixing Valve Taco Sweat - Lead Free @ $104.00
(3) 3/4 CRIMP X 3/4 MA SW ADPT PEX BRASS @ $8.67/3
1" Mixing Valve Taco Sweat - Lead Free @ $123.97
(3) 1 CRIMP X 1 MA SW ADPT PEX BRASS $13.47/3   

This first two photos below are side arm/sidearms, for traditional outdoor boilers with 2 Pex lines.

The last 4 photos are about built-in heat exchangers,
in outdoor boilers, requiring 4 Pex lines. 

Top sweated connection from side-arm heat exchanger to hot water tank

Be sure to use shut-off valves and an anti-scald valve!
Best for well water because of the larger openings that a plate heat exchanger uses

Mounted pump on a hot water heater for boiler with a built-in heat exchanger 

FOUR line hook-up
Link to Hydronic pumps 

Video: swapping wiring for summer

Bottom connection from side-arm heat exchanger to hot water tank

Sweated Fittings

Top connection: Simple 'T' brings hot water from your boiler, that has a built in heat exchanger, into your hot water tank

With FOUR line hook-up

Built-in heat exchanger in a HARDY outdoor boiler

Two or four-line hook-up

Installation kit: Everything needed for external built-in heat exchangers, to hook up your hot water heater

Domestic Hot Water Hook-up Kit for FOUR line hook-up

Plate Exchangers for Heating your Domestic Hot Water                        

A 10 or 20-plate water-to-water plate heat exchanger is all that it usually needed

The way I hooked mine up

Pump at the bottom, mounted to the 'T' that replaced the drain. See our kit

Alternative Method

Pump at pop-up valve: top or side