Nelsen 1.5" plastic No Hard Water By-Pass

Nelsen 1.5" Plastic No Hard Water Bypass is a bypass valve that routes untreated water around the softener only during regeneration, so hard water never reaches the service line.

• 1-1/2 inch nominal size for higher-flow residential and light-commercial systems
• Plastic construction for corrosion resistance and lighter weight
• "No hard water" design blocks bypass flow while the media is regenerating
• Keeps soft-water delivery consistent by preventing hard-water breakthrough during cycles
• Shipping weight about 2.3 kg
• Compatible with 1.5" Nelsen control-valve plumbing

Choose this bypass when a standard bypass would let untreated water slip downstream during a regeneration and you need protected outlets, appliances, or process equipment to stay on soft water. Confirm the 1-1/2 inch connection matches your valve and inlet/outlet plumbing before installation.

Isolate your softener in seconds

This 1.5-inch plastic bypass valve, configured with no hard-water bypass blending, lets you take your softener or filter offline without shutting off water to the house. Turn it to bypass and full flow routes around the unit, so you can service, program, or add salt, and still have running water at every tap while you work.

Fitment and function

The 1.5-inch plastic body suits larger-flow C-Series and compatible valves where a full-size bypass is needed to avoid choking flow. The no-hard-water-bypass configuration means it routes water either fully through or fully around the unit rather than blending, which is what you want when hard water should never reach the tap during normal service. Confirm your valve accepts the 1.5-inch plastic bypass and we will verify compatibility if you are unsure.

A smart addition to any install

Fitting a full-size bypass at installation makes every future task easier, from routine salt fills to eventual media changes, because you can isolate the unit in seconds without cutting water to the home. The plastic body will not corrode in the damp environment around a softener, and the 1.5-inch bore keeps pressure loss low on higher-flow systems where a smaller bypass would create a bottleneck.

Confirming the fit

Match the bypass to your valve family and connection type before ordering; send us a photo of your valve if you are not certain and we will confirm compatibility and any adapters you may need.