Choosing a 50 gallon water heater with a thermostatic mixing valve helps balance safety and performance for households with higher hot water needs. The right unit can deliver tempered water at a stable temperature while maximizing energy efficiency. Below is a curated selection that blends large-capacity models with mixing or boosting features, along with practical considerations to guide your decision.
| Product | Brand | Type | Key Feature |
|---|---|---|---|
| Rinnai REHP50 | Rinnai | 50 Gallon Electric/Heat Pump | Energy Star, high UEF, 73 GPH first hour |
| Cash Acme 24644 | Cash Acme | Tank Booster With Mixing Valve | Tempered water at 120°F, easy push-to-connect |
| Cash Acme 24643 | Cash Acme | Tank Booster With Mixing Valve | Safe temp 120°F, upgrade to 140°F |
| Charman Mfg 3/4″ Booster | Charman Manufacturing | Mixing Valve With Hose | Tempered water, 95–120°F range |
| GE 18 Gallon Lowboy | GE | Lowboy, 18 Gallon | Compact, easy install for small spaces |
Note: The five selections emphasize 50 gallon capacity or high-demand setups with mixing valve or boosting capabilities to meet safe, tempered water needs. Each entry includes a built-in mixing or temperature-control feature where applicable, helping you compare safety and efficiency across options.
Cash Acme 3/4 Inch Tank Booster With Mixing Valve
The Cash Acme 24644 booster uses a temperature actuated mixing valve and gauge to temper hot water, combining hot with cold to achieve a controlled output. It is designed to work with gas, electric, and tankless heaters, and supports PEX, PE-RT, CPVC, and copper piping. The valve helps prevent scalding by regulating output to 120°F (49°C), with an option to raise up to 140°F (60°C) for bacterial control. Easy push-to-connect installation minimizes plumbing work, avoiding soldering or gluing.
Cash Acme 3/4 Inch Tank Booster With Gauge, Corrugated Hose
This 24643 model similarly tempering hot water using a temperature-gauged mixing valve and an easy installation path with PEX, PE-RT, CPVC, and copper. Output remains at 120°F (49°C) for safety, with a hot-water supply adjustable up to 140°F (60°C) to inhibit bacterial growth. The kit emphasizes anti-scald operation and straightforward, solder-free setup.
Charman 3/4″ Tank Booster Thermostatic Valve
The Charman Manufacturing unit offers a temperature control booster that automatically mixes hot and cold water to deliver consistent tempered water. It is compatible with gas, power vent, electric, and tankless heaters. Safety is reinforced by maintaining output around 95°F (35°C), with a configurable upper limit to 120°F (49°C). Installation is easy via push-to-connect with common plumbing materials, and no soldering or crimping is required.
Rinnai REHP50 Electric Heat Pump Water Heater
This 50-gallon heat pump model from Rinnai emphasizes energy efficiency with an Energy Star certification and a high UEF of 3.75. It provides up to 73 gallons of hot water in the first hour, suitable for households of 3–4 with higher demand. Demand-Response enabled helps save money by reducing energy use during peak utility periods. While not a traditional mixing valve, its efficient operation complements tempered-water systems when integrated with additional mixing hardware.
Rheem PROE50 50-Gallon Electric Water Heater
Rheem’s 50-gallon model offers a reliable, space-efficient solution with automatic thermostat control and anode protection. It aims to serve households with multiple bathrooms or higher hot water demand. While primarily a large-capacity electric heater, its compatibility with in-line mixing devices makes it possible to pair with a thermostatic mixing valve for tempered output. The unit emphasizes longevity and a solid warranty profile typical of Rheem products.
GE 18 Gallon Versatile Lowboy Water Heater
GE’s compact 18-gallon lowboy is designed for tight spaces while providing a practical hot-water solution for small households or point-of-use scenarios. While not a 50-gallon model, its space-saving design makes it a viable pairing option with separate mixing valves for tempered outputs in limited installations. It supports straightforward replacement in apartments, condos, or rooms with height constraints.
GE 10 Gallon Plug-and-Play Electric Water Heater
This compact GE model is ideal for point-of-use needs or booster scenarios when paired with larger 50-gallon systems. Its plug-and-play 120-volt setup minimizes electrical work, and a standard 3/4-inch NPT connection supports flexible integration with temperature-control devices for safe tempered-water delivery in smaller zones.
MIZUDO 10 Gallon Point of Use Electric Water Heater
MIZUDO offers a compact 10-gallon unit suitable as a booster or stand-alone point-of-use heater. It features UL listing, a rapid heating design, and adjustable thermostat, making it a practical companion to larger 50-gallon systems that incorporate mixing valves. The tank’s size supports flexible placements in kitchens, baths, RVs, boats, or workshops while maintaining tempered-water capability when used with appropriate controls.
Buying Guide: Key Considerations For 50 Gallon Systems With Mixing Valve
- Flow and demand: Assess peak-hour hot-water needs. A 50-gallon heater paired with a thermostatic mixing valve can better sustain consistent temperatures for multi-bath households.
- Mixing valve compatibility: Look for anti-scald valves or thermostatic boosters that support common piping (PEX, CPVC, copper). Push-to-connect fittings simplify installation.
- Temperature ranges: Safe output typically targets 120°F, with adjustable options up to 140°F for specific needs. Ensure the valve allows precise, repeatable settings.
- Energy efficiency: Consider heat-pump or high-efficiency electric models for lower operating costs. Demand-response features can reduce utility bills during peak periods.
- Space and installation: Large-capacity electric or heat-pump units vary in footprint. For tight spaces, a lowboy or compact model with external mixing hardware may fit better.
- Maintenance and warranty: Check anode protection, warranty length, and service availability. Tanks and valves from reputable brands tend to offer longer-term reliability.
- Replacement vs. upgrade: If your current system lacks a mixing valve, pairing a booster with a 50-gallon heater provides tempered water and enhances safety without a full replacement.
In summary, the featured options blend 50-gallon capacity with mixing or boosting features to deliver tempered water safely and efficiently. When selecting, weigh capacity against layout, compatibility with your existing plumbing, and the availability of energy-saving modes or demand-response benefits.