Abacus Plumbing carries an extensive line of residential electric, gas, propane and oil-fired water heaters of the highest quality by some one of North America’s leading water heater manufacturers - GSW, Giant and AO Smith. 

The John Wood professional line of products provides exceptional reliability and performance in the field and has earned the brand loyalty of professional plumbers and contractors across the country. 

We are also proud to introduce a new line of high-performance commercial water heaters from GSW. The John Wood Signature Series was especially designed for the needs of the pro-installer. 

Electric models are custom built-to-order to meet your exact specifications. 

Gas models feature lower profiles for easy installation, smaller vent diameters and ultra-accurate dual electric thermostats for precision and control. 

All of our water heaters offer advanced features such as Tanksaver® stainless steel inserts to prolong tank life and all models meet or exceed ASHRAE energy efficiency standard 90.1 1999. 

ASME models are available and unique pre-certified conversion kits make propane-to-gas or gas-to-propane conversions quick and easy without the need for the usual on-site inspection costs. Our commercial offering also includes Polaris high-efficiency models and tankless water heaters (available in Canada only).