Hot Water Recirculation System

Posted Sat, 04/06/2013 - 1:47pm by kima


Hot Water Recirculation System Rebate - $100

Does it seem to take forever for hot water to reach your shower or bathroom sink on a cold winter morning? Not only can this test one’s patience, it also results in higher water bills as a lot of cold water goes to waste down the drain. Wait and waste no more! Receive a rebate of $100 when you install a self-activated or on demand hot water recirculation system. 

A hot-water recirculation system is a small water pump that works in conjunction with a plumbing system and a hot water heater. There are models available that work with either tank-type or tankless water heaters. The system is designed to more quickly provide hot water at the most distant plumbing fixture (from the hot water heater) and every fixture in series or close to the main line. A hot water recirculation system is usually installed under the bathroom sink in the bathroom farthest from the hot water heater.

When hot water is desired, you push a button installed near the fixture to activate the system. When activated, the pump rapidly pulls hot water from the water heater while simultaneously sending cool water from the hot water lines back to the water heater to be reheated. When the water reaches a preset desired temperature at the fixture, the system stops pumping and allows hot water to flow from the fixture. All cold water fixtures still receive cold water, and the system is designed to prohibit hot water from entering cold water lines. Optional wireless remote control units let the user turn on the system from any faucet or fixture in the house.

There are three types of hot-water recirculation systems:  (1) self-activated or on demand, (2) timer-controlled, and (3) thermostat-controlled. Self-activated systems bring the hot water to the desired fixture at the “request” of the user. These systems are usually activated by manually pushing a button placed next to the fixture. Some models may also be activated by remote control or motion sensors. Timer-controlled systems circulate the water based on preset time periods, generally set to when hot water is most commonly used (e.g., morning or evening showers). The longer the time period of operation, the greater the energy use and associated cost. Thermostat-controlled devices keep the water in the pipes constantly heated to a preset temperature, therefore using much more energy than the other two systems.

Water savings and energy costs
Self-activated hot-water recirculation systems are estimated to save at least 3,000 gallons of water per year in a typical four-person household. If the self-activated systems are used on a regular basis, the water savings can be even greater.  

A typical hot-water recirculation system costs about $200 to $600 (average $300) and has a lifespan of 10-15 years. Most systems can be installed by a handy homeowner, but hiring a professional is recommended and generally costs about $300. The systems require very little additional plumbing, but an electrical outlet is needed. 

The following link provides additional information on the design and operation of a hot-water recirculation system:

Rebate (Click here for a Hot Water Recirculation System Rebate)

$100 for self-activated or on demand hot-water recirculation systems only.

*Timer-controlled and thermostat-controlled systems are not rebated.

Local plumbing stores may carry or be able to order self-activated hot water recirculation systems. Additionally, although the District does not endorse or recommend any specific retailers, brands, or models, some websites that offer self-activated systems for purchase are listed below:

Advanced Conservation Technology Inc - D'MAND Kontrol® Hot Water Recirculation Systems at

Chillipepper– CP6000

Taco Residential and Commercial Hydronic Systems – D’MAND® System at

If you need assistance determining whether a particular hot water recirculation system qualifies for a rebate, or need additional information, please contact our Conservation Department at (831) 475-8500.

Hot Water Recirculation System Rebate Eligibility

Complete rebate eligibility requirements are listed on the hot water recirculation system rebate application. However, we still want you to be aware of the following:

  • Rebate applies to the self-activated hot water recirculation system only.  Parts, sales tax, and installation labor are not included.
  • Hot water recirculation systems must be installed and rebate applications must be postmarked within 90 days of the purchase date.
  • The maximum number of hot water recirculation system rebates is one per household.
  • A representative of SqCWD must be permitted to inspect the property to verify installation and proper construction.
  • The IRS requires all rebate program participants receiving $600 or more per calendar year in rebates to be issued an IRS Form 1099 unless exemptions apply. If you have received rebates from Soquel Creek Water District (SqCWD) totaling $600 or more in the current calendar year, you must submit a completed IRS W-9 Form (link to the W-9 form pdf) with your rebate application to receive a rebate.The Social Security or Tax ID number requested in the rebate application process is in compliance with exemptions to the Federal Privacy Act of 1974, 42 UCS 405 (c)(2)(c). Social Security numbers provided as part of the application process are held in confidence under terms of the Privacy Act and are not divulged or otherwise conveyed to individuals or organizations outside the SqCWD Rebate Program.