Solution Tank, 35 Gal Gray Poly

This 35-gallon gray poly solution tank stores brine or chemical solution for water-treatment systems. Molded by Nelsen Corp (part 6135-BLUE) from durable polyethylene, it holds the saturated salt or dosing solution that feeds a softener or a chemical feeder pump.

• Manufacturer: Nelsen Corp
• Part number: 6135-BLUE (alternate G21832NN7C00)
• Capacity: 35 gallons
• Material: gray polyethylene (poly)
• Shipping weight: about 24.5 lb empty
• Use: brine storage or chemical solution reservoir

A solution tank is where salt dissolves into brine for softener regeneration, or where a metering pump draws mixed chemical for continuous dosing of a treatment train. Polyethylene resists salt and most treatment chemistries, so the tank stands up to constant contact with concentrated brine without corroding or degrading. The 35-gallon size suits mid-range residential and light-commercial setups that need a solid working reserve of solution between refills, reducing how often an operator has to top it off. Pair it with an appropriate brine valve, safety float, and grid plate to build a complete regeneration assembly, or fit it with a feeder suction line for chemical dosing. Verify the tank footprint, height, and lid opening fit your existing valve and float hardware before installing.

A Reservoir for Treatment Chemistry

The 35-gallon Gray Poly Solution Tank gives you a durable, chemically resistant container for holding and feeding treatment solutions into a water system. It is the vessel commonly paired with a metering or chemical feed pump in setups that dose things like pH-adjusting solution, chlorine, or scale inhibitor ahead of the rest of the equipment. The gray polyethylene body shrugs off the corrosion that would quickly attack a metal container, and the generous capacity means fewer refills and steadier dosing between top-ups.

Where It Fits in the System

In a typical arrangement, the solution tank sits beside a feed pump that pulls from it and injects a controlled amount of solution into the water line. That makes it a core part of well-water and problem-water treatment trains where a filter or softener alone is not enough. If your current tank has cracked, clouded, or grown brittle from years of chemical exposure, swapping in a fresh poly tank restores a clean, sealed reservoir and keeps your dosing predictable.

Buy It Right the First Time

The solution tank works hand in hand with a feed pump, suction line, and often a mixing setup, so the right fittings and footprint matter. Tell us what pump and chemistry you are running and we will help confirm this tank suits your application before you order. A tank that matches your dosing setup keeps refills simple and your treatment steady. We pass along the documentation we have, and the Water Softener Plus team is glad to answer questions about setup, placement, and safe handling so your feed system runs cleanly and stays that way.