Solution 1: Turn off the cold water supply line to the faucet. If the dripping stops, service or replace the valve block on the cold water line. See below for valve block service procedure.

Solution 2: Turn off the hot water supply line to the faucet. If the dripping stops, service or replace the valve block on the hot water line.See below for valve block service procedure.

Solution 3: Pinch off the yellow tube between the pilot/actuator valve and the first valve block with pliers (DO NOT CRUSH). If dripping stops replace the pilot/actuator valve.

Solution 1: Turn off the hot and cold water supply line to the faucet. Disconnect the green tube from the valve block on the COLD WATER side. Slowly turn on the cold water, using a container to catch the water which should flow in a steady stream from the green line. If there is no flow or poor flow, service the cold water valve block (see below). If flow is good, proceed to the next solution.

Solution 2: Turn off the hot and cold water supply line to the faucet. Disconnect the green tube from the valve block on the HOT WATER side. Slowly turn on the hot water, using a container to catch the water which should flow in a steady stream from the green line. If there is no flow or poor flow, service the hot water valve block (see below). If flow is good, proceed to the next solution.

Solution 3: Ensure green tubes from valve blocks are reconnected following solutions 1 and 2. With the hot and cold water still turned off, disconnect the blue tube coming from the pilot/actuator valve from the first valve block. Slowly turn on the water supply to the faucet, once again using a container to catch water, and check the flow from the blue tube. If there is no flow or poor flow, replace the pilot valve.

Solution 1: Ensure that the pilot valve is in contact with the activation mechanism of your model by removing the pilot/actuator valve its housing and operating the top black button by hand. If the water flows, you will need to adjust the mechanism to ensure good contact.

Solution 2: Turn of the hot and cold water supply. Disconnect the blue tube coming from the pilot/actuator valve at the first valve block. Slowly turn on the water and check if there is steady flow from the blue tube. If flow is poor, replace the pilot valve.

Solution 3: With water supply to the faucet turned on, disconnect the yellow tube coming from the pilot/actuator valve at the first valve block. Using a container to catch any water, activate the Tapmaster^® and observe the water flow from the yellow tube. If there is no flow, replace the pilot valve. If there is a short burst of water, service the valve block (see below).

Solution 1: Turn off the cold water supply line to the faucet. Activate the water flow with the Tapmaster^®. If there is noise, service the valve block on the cold water line (see below).

Solution 2: Turn off the hot water supply line to the faucet. Activate the water flow with the Tapmaster^®. If there is noise, service the valve block on the hot water line (see below).

Step 1: Turn off the water supply(s) and disassemble the valve block by removing the four hex screws, take care not to lose the spring (see the illustrated breakdown).

Step 2: Remove the diaphragm and the filter-screen, clean all the ports in the body and manifold with vinegar or a commercial water deposit cleaner (paying attention to the small passages).

Step 3: Inspect the filter-screen and diaphragm and clean or replace as required (note: filter-screen is a dual purpose part, functioning as a coarse screen for the main water flow and is a porous plastic with 25 micron filtration to protect the control circuits).

Step 4: Reassemble the valve block as per the illustrated breakdown (pay attention to the alignment of the body diaphragm and manifold, take care not to crush the duck bill check valves on the diaphragm).

Step 5: Tighten the screws in an alternating crossing pattern. (hint: if the valve block is mounted use a little Vaseline or silicone grease to hold the spring in place).

* 1710 Models have been renamed 1721 as of January 1, 2022

• Model 1720/1721/1722/1730 standard cabinet activators (PDF)
• Model 1720L/1721L/1722L/1730L latching cabinet activators (PDF)
• Model 1720LB/1721LB/1722LB latching cabinet activators with external button (PDF)

* 1740 Models have been renamed 1751 as of January 1, 2022

• Model 1750/1752/1751/1758 Kick pedal activators (PDF)
• Model 176x Series foot pedals – End of Life (PDF)

• Model 1770/1771/1775 & 1776 Euro foot activators (PDF)

• Model 1780/1781/1782 & 1784 In-floor activators (PDF)
• Model 1786 In-floor activators with temp control (PDF)