TI 420 v5 0515 Page 6
● This parts list is for the E420 Model 1 only.
To be certain you are installing the correct parts, refer to Model Identification on page 2.
● Select Individual Parts from “Part#” column. Select Kits from “Kit#” column.
Item Part Description Part # Qty. Kit # Qty. Individual Parts Material
1-2 Lever Handle Assembly 420-336 1
(Models 8 &9)
1a Lever Handle -- -- 420-336 1 C.P. Zinc
1b Sleeve -- -- 420-336 1 C.P. Brass
2 Lever Handle Screw 410-365 10 1 C.P. Brass
3a-3d Tri-Handle Assembly (All Models 1-9) 410-565 1
3a Tri-Handle 410-191 1 410-565 1 C.P. Brass
3b Washer 046-008K 1 410-565 1 C.R. Steel
3c Screw 030-070 1 410-565 1 Stainless Steel
3d Plug Button (NS) 410-195 1 410-565 1
3-7 Acrylic Handle Assembly 420-337 1
3 Plug Button and Insert 420-314 1 420-337 1 C.P. Brass
4 Handle Screw 8-32 x 3/4” 034-515K 1 420-337 1 C.P. Brass
5 Washer 227-197 1 420-337 1 Neoprene
6a Acrylic Handle Knob -- -- 420-337 1 Acrylic
6b Sleeve 227-196 1 420-337 1 Brass
7 Knob Insert 420-213 2 420-337 1
8-12 Dial Assembly (Models 8 & 9) 420-335 1
8 Retaining Ring 227-166 1 420-335 1 C.P. Brass
9 Dial Graphic Insert (F°) 420-308 1 420-335 1 Aluminum
10 Dial Plate Screws:
(Concealed) 8-32 x 1-1/2” (2) 080-013 2 420-335 1 Brass
11 Dial Plate (Oval)420-166 1 420-335 1 Stainless Steel
12 Dial Gasket 410-284 1 420-335 1 Buna-N
13 Temp. Stop 420-212 2 420-451 -- Stainless Steel
14 O Ring 084-014 1 420-451 -- Buna-N
15 O Ring 047-010 1 420-451 -- Buna-N
16 Packing Gland 420-578 1 420-451 -- Brass
17 Huva Cup 225-404 1 420-451 -- Buna-N
18 Packing Stop Ring 420-508 1 420-451 -- Brass
19 Bonnet Screws 030-887 4 420-451 -- Stainless Steel
20 Bonnet 420-210 1 420-451 -- Brass
21 O-Ring 047-128 1 420-451 -- Buna-N
22 Adjustment Stem 420-139 1 420-451 -- Brass
23 Thermal Actuator -- 1 420-451/453-- Brass/Stainless Steel/EPPM
24 Cartridge Assembly -- 1 420-451/452-- Noryl/Stainless Steel
25 O Ring 047-029 1 420-451 -- Buna-N
26 O Ring 047-129 1 420-451 -- Buna-N
27 Valve Body N/A 1 N/A -- Brass
(Part of 22) Shutoff Disc 420-130 1 420-451 -- EPPM
Bonnet Stem Assembly -- -- 420-454
Soft Part Kit -- -- 420-102
-- Item not available as individual commercial part OR item not available as a commercial kit.
What to look for if:
The maximum temperature cannot be obtained...
a. Lime deposits may have accumulated in the hot water
pipes, restricting the hot water supply.
b. The hot water supply temperature may be too low.
c. The handle rotation setting may be too low. Remove valve
handle, and readjust the handle rotation stop (see Setting
the Handle Rotation Stop).
Flow of water is less than desired…
a. The upstream supply valves may not be fully open.
b. The inlet supply pressure(s) may be low.
c. Lime deposits may have accumulated in cartridge,
restricting water flow.
d. The showerhead may be clogged. Remove and clean.
e. The checkstops may be clogged. Refer to Preventive
Maintenance section and Form #129-028.
The valve opens with hot water flow rather than cold
water flow...
a. The inlet water supplies are connected to the wrong
ports. Remove the valve and reinstall.
The tempered water is too cold, although motor has
been replaced, 0R the hot water temperature is below
115°F...
a. Raise the temperature of the hot water supply.
Flow of water is completely shut off...
a. The upstream supply valves may be completely closed.
b. The hot or cold water supply pressure may have failed.
The HydroGuard 420 valve is designed to close down
upon cold water failure.
c. The checkstops may be closed. Access the checkstops
and open by turning the adjustment screw fully counter-
clockwise.
TROUBLESHOOTING
PARTS LIST - E420 Model 1
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