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Fluidmaster S2DBL - User Manual

Fluidmaster S2DBL
16 pages
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Release clip
Flush valve lock nut
Rubber gasket
Fill valve
Threaded shank
Shank washer
Lock nut
Cone washer
Water supply line
Rell mount
Corrugated tube
Roller clamp
Rell tube &
locking clamp
PARTS LIST
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Flush valve
Lever mounting base
Flush handle assembly
Grey/Blue oat stop
Grey oat (Full Flush)
Flush valve washer
Bolt
Rubber washer
Brass washer
Brass nut
Overow tube
Rail
Blue oat (Half Flush)
www.uidmaster.com 1
Overview
READ ENTIRE INSTRUCTIONS BEFORE STARTING INSTALLATION

Questions and Answers

  • N
    Nathan SmithJul 31, 2025
    Why won't my Fluidmaster S2DBL Plumbing Product fill valve turn off?
    • H
      Heather WalkerJul 31, 2025
      If the Fluidmaster Plumbing Product fill valve won't turn off, it might be due to debris at the seal caused by sand and rust moving through water pipes. To resolve this, always clear debris from water lines. Alternatively, the seal inside the valve top may be damaged, in which case you should replace it with a genuine Fluidmaster 242 seal.
  • E
    Erin WashingtonAug 4, 2025
    How to improve full flush on Fluidmaster Plumbing Product?
    • B
      Brittany AndrewsAug 4, 2025
      If the full flush on your Fluidmaster Plumbing Product isn't removing waste adequately, lower the grey float to allow more water to be flushed.
  • C
    craig11Aug 8, 2025
    How to increase water level in Fluidmaster Plumbing Product bowl?
    • R
      Russell WilkersonAug 9, 2025
      If the water level in the bowl of your Fluidmaster Plumbing Product is too low, move the roller clamp to a higher number.
  • D
    Debra Brewer DDSAug 13, 2025
    What to do if half flush on Fluidmaster S2DBL Plumbing Product is weak?
    • M
      Mrs. Laura Johnson MDAug 13, 2025
      If the half flush on your Fluidmaster Plumbing Product isn't removing waste adequately, lower the blue float to allow more water to be flushed.
  • T
    theresawilsonAug 17, 2025
    How to fix Fluidmaster S2DBL Plumbing Product overflow tube sticking open?
    • B
      Brian Thomas Jr.Aug 17, 2025
      If the overflow tube sticks open on full and half flush of your Fluidmaster Plumbing Product, remove the cable mount from the Dual Flush assembly. Check the lever cable for kinks and straighten them by hand. If the cable still sticks, replace it.
  • S
    Scott WatkinsAug 21, 2025
    How to stop a Fluidmaster Plumbing Product seal from leaking?
    • J
      Jaime NguyenAug 21, 2025
      If the dual flush valve of your Fluidmaster Plumbing Product is leaking, unclip the valve from the base and realign the seal.
  • T
    Teresa TateAug 26, 2025
    Why does Fluidmaster Plumbing Product full flush close immediately?
    • C
      contrerasvanessaAug 26, 2025
      If the full flush closes immediately after the lever is released on your Fluidmaster Plumbing Product, the top of refill mount should be set 2” above top of overflow tube. Raise the refill mount higher.

Summary

Step 1: Remove Old Parts

Remove Fill Valve

Disconnect the water supply and remove the existing fill valve from the toilet tank.

Step 2: Install Flush Valve

Cut Overflow Tube and Refill Hose

Cut the overflow tube to the measured length and trim the corrugated refill hose if needed.

Install Flush Valve in Tank

Place the flush valve in the tank and hand-tighten the lock nut onto the threaded shank.

Step 3: Install Fill Valve

Adjust Fill Valve Height

Adjust the fill valve height to be approximately 3" higher than the overflow tube.

Step 4: Reassemble

Reconnect Water Supply Line

Reconnect the water supply line, hand-tightening only, avoiding lubricants.

Step 5: Final Adjustments

Adjust Fill Valve Water Level

Compare water level to the marked line and adjust the fill valve using the adjustment screw.

Adjust Blue Float for Half Flush

Adjust the blue float to control water usage for the half flush by lowering the float setting.

Adjust Grey Float for Full Flush

Adjust the grey float to control water usage for the full flush based on residual water level.

Step 6: Fine Tuning

Completed Installation

Troubleshooting

Fluidmaster S2DBL Specifications

General IconGeneral
MaterialPlastic
Adjustable HeightYes
TypeDual Flush
Product TypeToilet Flush Valve
Flush Volume (Full)1.6 gallons (6 liters)
Flush Volume (Reduced)0.8 GPF
ColorWhite

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