Store SKU #
A: Sometimes. You should call your local store OR go to the web site and see if you can buy it online. Web page will usually tell you how many are in stock.
A: You would have to check the store directly for o In stock inventory
A: The valves included technically have a 3/4" inlet/outlet, however adapters are provided to place them inline with 1" fittings. You may find more helpful info searching the individual "3/4 in. or 1 in. Green Jar Top Valve" product page (there are two of these Orbit valves included in this manifold).
A: The replacement diaphragm for this manifold is the Orbit 57225.
A: I would add any filters before the manifold. How you add depends on the type of filter. The connections on the manifold can be glued.
A: Always "up stream".