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Designed for Zodiac backwash systems, the Barrel Union Zodiac Backwash Site Glass 40mm delivers a clear, reliable window into your filtration line. Constructed from durable plastic with a rubber O‑ring, it provides a leak‑tight seal that stands up to regular backwash cycles without corrosion. The 40mm BSP thread ensures a straightforward connection to standard 40mm pressure pipe, making installation quick and maintenance simple.
Key features
All-plastic construction with rubber O‑ring for a durable, watertight seal and easy maintenance.
Barrel union design enables fast removal and quick access during backwash inspections or filter maintenance.
40mm BSP thread provides reliable compatibility with standard 40mm pressure piping used in pool, spa, and irrigation systems.
Transparent sight glass lets you monitor backwash flow, assess debris clearance, and confirm proper operation at a glance.
Universal fit within Zodiac backwash and related 40mm installations for flexible integration across compatible setups.
What it’s ideal for
Pool filtration systems where backwash visibility is critical to maintenance planning.
Spa and hot tub filtration lines requiring a reliable, easy‑to‑inspect sight glass.
Irrigation or water treatment setups that use 40mm pressure piping and backwash valves.
Installation and maintenance tips
Ensure the receiving connection is clean and compatible with 40mm BSP threads before installation.
Check the rubber O‑ring for any damage; replace if cracked or worn to preserve a watertight seal.
Lubricate the O‑ring lightly with a compatible, non‑corrosive lubricant if required by your system guidelines.
Thread the union onto the 40mm connection and tighten just enough to stop leaks—avoid overtightening.
After installation, run a brief backwash cycle and inspect for leaks around the joint; if needed, reseat and re-tighten.
With the Barrel Union Zodiac Backwash Site Glass 40mm, you gain proactive visibility into your filtration process, reduce guesswork during maintenance, and keep your system operating at peak efficiency. It’s the practical, durable solution for reliable backwash monitoring in 40mm piping environments.
