Neptune HP PROTECTUS III, Installation And Maintenance Manual

Page: 47 / 68

Setting the Spring of the Knuckle Valve
To set the knuckle valve, complete the following steps.
1. Insert the bolts you removed from the side of the knuckle valve housing into the same bolt
holes, but install the bolts so that their threads are sticking out of the knuckle valve
housing.
Figure 45 – Knuckle Valve Bolt Holes
2. Place the new knuckle valve assembly on the bolts.
3. Tighten the nuts onto the bolts so the knuckle valve is secure on the outside of the
housing.
4. Compress the knuckle valve by pulling the rubber disc back toward the basket strainer.
Figure 46 – Compressing the Knuckle Valve
The spring is very strong, take caution not to injure yourself while compressing it. It is
advisable to use two people to compress the spring.
HP PROTECTUS ® III Installation and Maintenance Guide 33
Chapter 4: Maintenance and Troubleshooting