Doughboy Valve Service Bulletin

SERVICE BULLETIN #200
SUBJECT: Change to Filter Valve Parts

The diameter of the hole in the OLD 340-1187 valve rotor and OLD 340-1188 valve handle has been changed. The OLD 378-1016 handle pin has been made smaller. The factory is no longer making the old parts. The parts are no longer available and will be replaced by new part numbers.

If any one of the old parts has to be replaced you will need to replace all 3.

NOTE: If you have purchased a valve conversion kit 1121-1644 or your filter is newer than 1999 you can use the new numbers and order individual parts as needed. If in doubt order the complete kit 1121-1644

ITEM	OLD	NEW	DESCRIPTION
13	340-1187	340-2229	Valve Rotor
14	340-1188	340-2228	Valve Handle
3	378-1016	376-1050	Valve Pin
Basic Kit number is 1121-1644

Click for Details

Rebuild Kits & Assembled Valves

Use 1121-1644-2
for Silica II, Sequence II

Use 1121-1644-3
for Media Master 1701, 1702
same as 1121-1644-2 but with 1107-1486

Figure A
ORDER

FOR A COMPLETE
VALVE REBUILD

Start with Kit 1121-1644 (left)
if parts are before 2000.

Add items below as needed.

Item	Req	Part Number Description
4	2	327-1007 Plastic Washer
11	1	396-1018 Spring
12	1	308-1044 O-Ring
10	2	327-1006 Washers
15	1	307-1022 Spider Gasket
40		1121-1644-1 Complete Rebuild Kit all parts Not Assembled
41		1121-1644-2 Complete Rebuild Kit all parts Assembled for Silica II, Sequence II
42		1121-1644-3 Complete Rebuild Kit all parts Assembled for Media Master 1701, 1702

Different Valve Covers for Different Filters
Although the valve covers look the same at first glance, they are different.
Your old labels may be faded but you can tell by looking at the valve positions.

A valve, generally, leaks either thru the Valve Rotor stem hole in the cover or from the backwash port. This is usually caused by grit getting in under the handle, and consequently, into the hole in the valve cover. The valve rotor stem becomes scored and then doesn't seat properly after changing valve positions.

You may be able to temporarily get by with your valve as is...if after you change valve positions "press the handle all the way down on the end and let go", allowing it to pop into place. Most times that will over come the resistance caused by the "scored" Valve Rotor (Valve Rotor is what the handle is attached to, and presses against the Spider Gasket creating a seal in all the directional chambers directing water to pool, backwash port and from the pump)
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When replacing parts do the following:

- To remove or replace the pin from the handle you will need to relieve the tension of the valve spring by either using a vise or couple of clamps. If you have four strong hands you can skip the clamps.

- Make sure you pay attention to how the handle fits on the valve key stem. If put on backwards it causes everything to reverse.

- When you have the cover detached from the valve key stem, very lightly sand any scored marks on the stem and also in the hole where the stem fits.