RPI Part #ADK278
OEM Part #38-1871-00 (Version 2)

HANDPIECE CONTROL BLOCK

• Version 2 (3 Position) design
• Material: Brass/Aluminum
• See Notes below for parts included in the handpiece control block

Fits: Delivery Units (3 Position) Models: 332, 333, 334, 335, & 336
Model(s) This Part Fits: Handpiece Control Block 300 Series (38.1871.00)

Part Description Updated: 6/20/2025

Notes:

Includes:

• Control block,
• (1 pkg) Knob (Flow Adj.) (RPI Part #ADK281),
• (1 pkg) Uni-clamp (RPI Part #ADC034),
• Stem (Air Coolant) (RPI Part #ADS279),
• (2) Water Cartridge Assembly (RPI Part #ADC287),
• Water Cartridge Assembly Dry (RPI Part #ADC288),
• (3) Stem Cartridge (Flats) (RPI Part #ADC285),
• (3) Stem (Drive Air) (RPI Part #ADS235),
• Diaphragm (RPI Part #ADD282),
• Barb Retainer (RPI Part #ADR283),
• (10 pcs) Barb (RPI Part #ADB012),
• (1 pc) Barb (RPI Part #ADB230),
• (1 pc) Hex plug (RPI Part #ADP057),
• (7 pcs) Socket Head Cap Screw (RPI Part #RPH740),
• (12 pcs) Flat Washer (RPI Part #ADW038)

Also available:

• Quick Disconnect Plug (RPI Part #ADP232),
• Quick Disconnect Barb (RPI Part #ADB248),
• Quick Disconnect Barb (RPI Part #ADB249),
• Quick Disconnect Barb (RPI Part #ADB250),
• Quick Disconnect Barb (RPI Part #ADB251),
• Replacement Stem (Water Flow Adj.) (RPI Part #ADS280) for the stem cartridge
• Handpiece Control Block (RPI Part #ADK277) to fit the 500 Series (38.1970.00)