The pair of water filter valves (not a recent photo!) |
Filter valve section drawing (from S-Type Waggon Parts Manual) |
An unusual feature of the valve is that it has two seats (10). The obvious one closes the water inlet to the right; less obvious is the seat to the left which closes when the valve is fully opened. This is to stop the water from seeping out through the valve threads. I guess this is a simple, low-maintenance alternative to gland-packing the valve spindle.
The filter element and other component parts are shown below.
Component parts showing the filter mesh |
Drain plug shown highlighted |
However, Sentinel 6515, Isebrook, which usually lives at Quainton Road, has its filter valves inverted as in the photo below!
Isebrook's inverted valves |
Stud frangibility... |
... and the brand new replacement |
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