Pentair #8 External Tooth Lockwasher OEM | U43-21SSZ Standard 2" also inspect the valve body

also inspect the valve body and cover for warping or cracks

Digital connectivity with your pool’s automation system and an advanced ignition control module with flame strength sensor help to ensure optimal heater performance

and other hard-to-clean debris

and dim to your preferred brightness for tailored ambiance

Simple Drop‑In Installation: Easily installs with standard tools—ideal for both pros and DIY maintenance

Pentair #8 External Tooth Lockwasher OEM | U43-21SSZ Standard 2" also inspect the valve bodyPentair #8 External Tooth Lockwasher OEM Pump Hardware U43 21SSZ OEM Pentair U43 21SSZ #8 external tooth lockwasher. Prevents loosening from vibration in Max E Pro, IntelliPro, and Dura Glas pumps. Features OEM Pentair replacement for secure fastening performance. External tooth design locks screws in place under vibration. Corrosion resistant stainless steel for long service life. Description The Pentair U43 21SSZ External Tooth Lockwasher (#8) is a