| Model numbers | Type | Repair part | Handle |
|---|---|---|---|
| 100-DST, 101-DST, 175-DST, 300-DST, 400-DST (with side spray) | Kitchen, single handle | RP50587 DIAMOND cartridge | Single lever |
The Classic series is the plain chrome single handle faucet found in rentals and builder kitchens everywhere. Older Classics were ball type; anything with DST in the model number uses the RP50587 cartridge. If yours has a dome cap and adjusting ring instead of a flat bonnet nut, use the ball type guide.
Before you start. Shut off the two small valves under the sink by turning them clockwise, then open the faucet to confirm the water has stopped. Plug the drain so small parts cannot fall in. You will need a screwdriver, an adjustable wrench or pliers, and for most handles a hex key (an Allen wrench, sold as an inexpensive set at any hardware store). If a shutoff valve will not turn or starts to drip, or anything is corroded and will not loosen with moderate force, stop and see when to call a plumber. New to this? Start here explains the parts and tools in plain language.
Not sure this is your faucet? See how to identify your Delta cartridge without a model number, or how to find your brand and model.
Taking it apart
- Pry off the red and blue button (RP28906) and loosen the set screw (RP54233 or RP152) with a hex key. Lift the handle.
- Unscrew the cap (RP51502).
- Unscrew the bonnet nut (RP51503) with an adjustable wrench.
- Lift the cartridge out.
Repairs for this faucet
- Drip from the spout or leak under the handle: replace the DIAMOND cartridge
- Side spray weak or stuck on (400): diverter under the spout
- Hot and cold reversed: swap the supply lines
- Low pressure: aerator or wand screen
Parts
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