Diaphragms can become worn over time from debris and regular use. This can cause the valve to not function properly. This is a replacement diaphragm only. The diaphragm works with the following Weathermatic 1 1/2" valve series:

• 11000 Series
• 21000 Series

The assembly kit comes with the following repair part:

• WM49110 - (1) Diaphragm