Alternative Configurations

This tech set is your guide to a more affordable, energy-efficient and water-efficient water distribution network. It has been designed to maximize the benefits of each listed product. Since every project is unique, all five recommendations from this tech set may not be applicable. For this reason, we offer five alternatives to this Tech Set.

CPVC Water Supply Piping

Some plumbers and contractors may prefer to use CPVC pipes instead of PEX. When installing CPVC supply lines, use the tree/ branch style per prescriptive measures contained in the International Residential Code.

The rest of the features from this Tech Set are still relevant.

High-Efficiency Tank Water Heater

If a homeowner would prefer a tank water heater to their tankless counterparts, install an energy-efficient, quick-recovery tank heater with integral heat traps.

The rest of the features from this Tech Set are still relevant.

Plumbing without AAVs

In the off chance that local codes do not allow AAVs, instead design the drain/waste/vent (DWV) system with through-the-roof or gable end-mounted vent stacks.

The rest of the features from this Tech Set are still relevant.

Tech Set without Greywater Piping

If you prefer not to install a greywater DWV pipe design for current use or future retrofits, the rest of the features from this Tech Set remain relevant.

Hybrid Piping for House Larger than 2,000 Square Feet

For a home larger than 2,000 square feet, install an insulated tree/branch system to supply the mid-plumbing-run manifold for the parallel PEX or Al-PEX supply from that point to the fixtures. A hybrid zone system would also be efficient.

For larger homes, the rest of the features from this Tech Set are even more relevant than for smaller homes because the savings that they produce are magnified.

Content updated on 12/7/2005