- Shut off water supply to tank. Flush tank and sponge out remaining water. Remove old fill valve assembly, tank ball, and wire guide unit (or flapper), using pliers if necessary.
- If you have a Fluidmaster bowl cleaning system, carefully disconnect the tube from the FILL VALVE. Do not disconnect the tube from the dispenser (if you don’t have a cleaning system, continue to Step 3)
- Disassemble small parts – LOCK NUT, SHANK WASHER and ANGLE ADAPTER for VALVE installation (required); CONE WASHER and COUPLING NUT for water supply connection (optional–see Step 8).
- Carefully remove CONE WASHER from center of SHANK WASHER. Place SHANK WASHER on THREADED SHANK of new VALVE. Place flat surface against VALVE.
- When installed, the CRITICAL LEVEL MARK on the FILL VALVE (identified by a C.L. mark on the Fluidmaster FILL VALVE) should be at least 1" above the top of the OVERFLOW PIPE. This is a plumbing code.
- To adjust the height of the FILL VALVE, twist the THREADED SHANK in or out of VALVE body. The height of the VALVE adjusts from 9 to 14 inches. On some models, a clicking noise will be heard when adjusting the height. This is normal.
- Position VALVE inside tank. Push down on the VALVE SHANK (not the TOP) while tightening LOCK NUT. Hand-tighten only. DO NOT OVERTIGHTEN or tank may crack. Make sure FLOAT CUP does not touch toilet tank walls, trip mechanism or FLUSH VALVE.
- Before continuing, determine the type of water supply connection you have from the chart on the left and use the appropriate assembly parts required to properly reconnect the water supply. DO NOT use plumber’s putty to seal these fittings.
- With correct WASHERS in place (see Step 8), tighten COUPLING NUT. Hand-tighten only. DO NOT OVERTIGHTEN. CAUTION: DO NOT USE CONE WASHER WITH PLASTIC SUPPLY LINE.
- If you have a Fluidmaster bowl cleaning system, re-attach tube (“IN”) to FILL VALVE NIPPLE (see Diagram 1). Be sure toilet tank flushing components move freely (if you don’t have a cleaning system, continue to Step 11).
- Remove and discard overflow pipe cap if present. Attach one end of black REFILL TUBE to ANGLE ADAPTER and the other end to NIPPLE located near top of VALVE. Attach ANGLE ADAPTER to OVERFLOW PIPE. Trim REFILL TUBE as necessary to prevent kinking. NOTE: Flow from REFILL TUBE must be positioned just above the OVERFLOW PIPE. Do not insert REFILL TUBE down into OVERFLOW PIPE below water level. This will siphon water down the OVERFLOW PIPE, which causes the VALVE to turn on and off as it tries to keep the tank full. If the ANGLE ADAPTER cannot be used, you may need the Model 599 Refill Clamp (not included).
- IMPORTANT: Always clear sand and rust from system. Make sure water supply is shut off. Remove VALVE TOP by lifting arm and rotating TOP and ARM 1/8 turn counterclockwise, pressing down slightly on cap.
- While holding a container over the uncapped VALVE to prevent splashing, turn water supply on and off a few times. Leave water supply off.
- Replace TOP by engaging lugs and rotating 1/8 turn clockwise. MAKE CERTAIN TOP IS TURNED TO THE LOCKED POSITION. VALVE may not turn on if TOP is not fully to the locked position.
- Turn on water supply. Submerge the FLOAT CUP under the water for 30 seconds. Adjust the water to desired level by turning WATER LEVEL ADJUSTMENT ROD and moving FLOAT CUP up or down. Water should end up 1/2" to 1" below top of OVERFLOW PIPE.
IF FILL VALVE WON'T TURN OFF,
• There may be debris at seal – repeat Steps 12-14.
• The seal inside the VALVE TOP may be damaged – replace with genuine Fluidmaster 242 seal.
IF FILL VALVE TURNS OFF AND ON DURING PERIODS OF NON-USE,
• There may be a leak at the FLAPPER.
• The FLAPPER is misaligned.
• The seat is corroded or damaged – replace with Flusher Fixer Kit, Model 555C.
• The end of the REFILL TUBE is inserted into OVERFLOW PIPE below water level in tank (See Step 11).
© 2011 Fluidmaster, Inc. All rights reserved. This document is not a substitute for the product instructions, which may be found at www.fluidmaster.com. Fluidmaster, Inc. shall not be liable for any damages resulting from failure to install or maintain the product in accordance with the product instructions, from abuse or misuse of the product, from use of non-Fluidmaster, Inc. parts, or from overtightening. Do not use in-tank drop-in toilet bowl cleaners containing bleach or chlorine.