B/Mc Valve Rebuild Kits
One kit covers both the air and electric B/Mc valves — the wet end is the same. Randco part 70-064.
What’s in the kit
Four parts — items 4, 5, 6 and 8 on the parts diagram.
| Part | Randco SKU |
|---|---|
| Diaphragm | 03-006 |
| Rubber Ball | 03-005 |
| Spring | 03-007 |
| Stem | 03-008 |
Each part is also available individually if only one has failed — the part names above link straight to them.
When to rebuild
- Weeping when closed — usually the ball or the diaphragm.
- Slow to close — commonly the spring, or exhaust restriction.
- Will not seal at all — inspect the seat before assuming the kit will fix it.