Hercules®Hercules® Refractometer is designed for hydronic heating and cooling closed loop systems, most solar heating systems, snow melts, radiant heat and general plumbing systems.
Part #: 35290
- For heating systems requiring freeze protection as well as corrosion prevention
- Use in systems fabricated with metal, plastics (except CPVC) and rubber piping, fittings, seals and other parts
- Blend of 45 percent virgin propylene glycol and the triple protection inhibitor package