Haws 8740 Guide

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 1 of 33
1455 Kleppe Lane Sparks, NV 89431-6467 [phone] Fax [phone]
E-mail: [e-mail]  Website: www.hawsco.com
No. 0510000842(1)
Model 8740 / 874301S
Overhead Tank Shower and Optional Eye/Face Wash
Non-Electric, Self-Contained, Indoor, Gravity Fed
INSTALLATION, OPERATION
&
MAINTENANCE INSTRUCTIONS

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 2 of 33
IMPORTANT
Read this installation manual completely to ensure proper installation, then file it with the owner or
maintenance department. Compliance and conformity to drain requirements and other local codes and
ordinances is the responsibility of the installer.
Separate parts from packaging and make sure all parts are accounted for before discarding any
packaging material. If any parts are missing, do not begin installation until missing parts are obtained.
Flush the water supply lines before beginning installation and after installation is complete. Test the unit
for leaks and adequate water flow. For ANSI Z358.1 compliance, the main water
supply to the
emergency fixture should be “ON” at all times. Provisions should be made to prevent unauthorized
shutoff.
The ANSI Z358.1 standard requires a 20 GPM flow rate for the shower and a 3 GPM flow rate for the
optional Eye/Face Wash of flushing fluid for 15 continuous minutes. Haws Model 8740 self-contained
shower requires a minimum fill pressure of 20 PSI
and a minimum fill flow rate of 15 GPM for the
shower only or 20 GPM for shower and optional Eye/Face Wash combination at the automatic refill
connection to meet this requirement.Flushing fluid should be tepid per ANSI Z358.1. Haws Model 8740
should be installed in an indoor area that has an ambient temperature between 60°F and 100°F to meet
this tepid water requirement.
The tank water level should be checked weekly to ensure that the tank is full. For ANSI Z358.1
compliance, the automatic refill connection must be connected to an adequate potable water source.
This unit discharges water to the floor. It is recommended that this unit be installed in an area that
has adequate floor drainage. Failure to do so may result in major property damage.

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 3 of 33
DESCRIPTION OF PRODUCT
Haws Corporation Model 8740 non-electric, self-contained overhead tank shower and optional Model
874301S Eye/Face Wash is designed for use in indoor areas where the temperature is normally between
60°F and 100°F. The 330-gallon high density polyethylene (HDPE) overhead tank is discharged by gravity
upon shower or optional Eye/Face Wash activation. The unit is equipped with a 1-1/4” NPT inlet water
connection and float valve for automatic refill.
The unit is designed to meet ANSI Z358.1 standards for flow and duration if it is connected to a suitable
permanent potable water source. Haws Model 8740 self-contained shower requires a minimum fill pressure
of 20 PSI and a minimum fill flow rate of 15 GPM for the shower only or 20 GPM for shower and optional
Eye/Face Wash combination at the automatic refill connection to meet this requirement. Water should be
tepid per ANSI Z358.1. Haws Model 8740 should be installed in an indoor area that has an ambient
temperature between 60°F and 100°F to meet this tepid water requirement.
The optional Model 874301S Eye/Face Wash available for this unit utilizes Haws Axion MSR (Medically
Superior Response®) eyewash design. The AXION MSR Eye/Face Wash uses an inverted stream design
which sweeps chemical and particulate contaminants away from the vulnerable nasal cavity, consistent
with medical irrigation protocols.
Although optional, the Model 9084 is recommended for use with the Model 8740. The Model 9084 is an
immersible Cleansing Stick that gives continual protection against pathogenic bacteria for water storage
systems. It balances the PH of the water preventing the build-up of bio-film, scale, and corrosion for up to
3 years with proper usage.

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 4 of 33
SHIPPING, HANDLING AND STORAGE
Model Description Dimensions W x L x H
(Assembled) Dry Weight Filled (Wet)
Weight
Dimensions
W x L x H
(Shipping)
Weight
(Crated)
8740
Haws Overhead
Tank Shower
55” x 59” x 150”975 lbs. 3750 lbs. 60” x 49” x 79” 1025 lbs.
Recommended Equipment, Materials, and Supplies to be provided by Installer:
•Existing slab on grade. The installer shall verify that the following minimum requirements of the
existing slab-on-grade are satisfied.
oAllowable Soil Bearing Pressure: 1500 psf
oSlab-on-grade minimum thickness: 6 inches
oCompressive Strength of slab, f’c: 3000 psi
oAdequate footprint area (minimum 6’ x 6’ recommended)
oAdequate vertical space (minimum 14.5 ft. recommended, 13 ft. required)
•Recommended anchors (Not Included, customer to determine anchor suitability):
High strength adhesive anchors (ICC-ES Report ESR-3187): Hilti HIT-HY 200 Safe Set epoxy
adhesive anchorage system and Hilti hollow drill bit system with 5/8” diameter Hilti HIT-Z Rod, 2
ASTM F844 flat washers, and ASTM A563 Grade A nuts. Frame Feet mounting holes are 13/16”
diameter. Hilti specifies 3-3/4” minimum embedment depth per HIT-Z specifications. Frame Feet
have four (4) 13/16” diameter clearance holes (16 total anchors).
•A forklift capable of lifting 2,000 lbs. should be utilized to transport the unit from truck to site and to
lift tank into position.
Tools and Supplies
•Impact drill/driver with 5/16” nut driver (For Optional Eye/Face Wash Option).
•Steel Strap Shears
•Torque wrench with 7/8” and 9/16” sockets.
•7/8” and 9/16” box end wrenches.
•Plumbing supply materials including potable water-safe thread sealant for PVC.
(Automatic refill water connection is 1-1/4” NPT male pipe fitting.)
•Appropriate personal protective equipment including safety glasses and work gloves.
Storage
The unit should be stored in a clean, dry place until ready for installation.

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 5 of 33
PALLET CONTENTS
NOTE: Confirm all components listed for the Model 8740 are present before assembly.See Figure 1.
(For optional Model 874301S Eye/Face Wash Assembly components see page 21.)
ITEM #
DESCRIPTION
QUANTITY
1
Tank Assembly
1
2
Frame Back Panel
2
3 Frame Side Panel 4
4 Frame Feet 4
5 Frame Connection Bars 4
6
½-13 X 3” Bolt
16
7
½-13 X 5” Bolt
16
8
½” Flat Washer
64
9
½” Lock Washer
32
10
½-13 Nut
32
11
Shower Piping Assembly
1
12
Shower Head
1
13 Shower Pull Rod 1
14 1-5/8” x 38” Steel Strut 1
15 3/8-16 X 1-1/4” Bolt 2
16 3/8” Flat Washer 4
17
3/8-16 Nut
2
18
1-1/2” Strut Pipe Clamp Assembly (2 straps, 1 bolt, 1 nut)
1
19
Tank Breather Vent, 2” NPT
1
Figure 1. Pallet Contents Model 8740; Item #1 Tank Assembly Removed

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 6 of 33
MODEL 8740 ASSEMBLY & INSTALLATION PROCEDURE
1. Transport the palletized unit to the installation point via forklift, ensuring the forks are inserted through
the shipping pallet.
2. The installation area should be located indoors on a level floor capable supporting up to 4,000lbs spread
across the four Frame Feet. Suitable concrete flooring is preferred. If unit is to be placed over a drain,
the drain should be able to handle a flow of 35 GPM; otherwise, the slab should allow the water to drain
away from the unit.
3. Confirm there is suitable available vertical space where the unit is to be installed. The unit requires a
minimum of 13ft vertical spacefor installation, 13.5ft of vertical space for assembly, and 14.5ft of vertical
space to insert or remove the optional Model 9084 Cleansing Stick if utilized.
4. Remove the plastic wrap packaging around the palletized unit.
5. Cut the three (3) steel bands that strap the unit to the wooden pallet as shown in Figure 2. DO NOT
cut the steel bands on top of the tank assembly (these 4 bands retain the tank on the tank frame and
will not be removed).
Figure 2. Removing 3 Steel Bands
6. Use a forklift to lift the Tank Assembly (Item #1) from the palletized unit, using the fork slots on the Tank
Assembly, and set the Tank Assembly aside.
7. Remove box of components from the pallet and remove components from the box. Next, remove
shipping screws/washers holding frame components to pallet. Discard shipping/screws. Place all
components in a secure area until needed.
Cut and remove
three steel bands
that strap the unit
to the wooden
pallet ONLY.

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 7 of 33
8. At the top of the tank, remove the shipping plug from top cap and cut cable tie holding the float for
shipping protection. Ensure the cable tie does not drop into the tank. See Figure 3.
Figure 3. Remove Shipping Plug and Detach Shipping Protection for Float
Remove shipping
plug & cut cable tie
Float

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 8 of 33
9. Figure 4 shows an exploded view of the assembly.
Figure 4. Exploded View of Model 8740
3-INCH BOLTS
IN FRONT
5-INCH BOLTS
USED FOR
BACK PANEL
UPPER FRAME
LOWER FRAME

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 9 of 33
10. Begin by assembling the lower frame shown in Figure 5. With all four (4) Frame Feet present, place
one Frame Back Panel over two back Frame Feet posts. Holes must be aligned front to back and panel
cross-bracing strips must be on the outside (toward the back) as shown in Figure 5.
IMPORTANT!! The two (2) mounting holes must be oriented as shown in Figure 5 to ensure unit can
accept optional Model 874301S Eye/Face Wash in the future.
Figure 5. Lower Frame
11. Place one (1) Frame Side Panel over each of the two (2) front Frame Feet posts with the panel cross-
bracing strips to the outside as shown in Figure 5.
12. Set the back of each of the two (2) Side Frame Panels on the Frame Feet plates of the Back Panel with
the mounting holes aligned as shown in Figure 6. Confirm the panel cross-bracing strips are on the
outside.
Figure 6. Frame Side Panel on Back Frame Foot
13. Typical bolting arrangement is shown in Figure 7 for reference in the next steps.
IMPORTANT!!
Two Eye/Face
Wash mounting
holes must be
located here on
the lower frame
assembly!
Frame Back Panel
Frame Foot Plate
Cross-Bracing
Strips
Frame Side Panel

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 10 of 33
•5” bolting is for attachment of back panels through feet or connectors to side panels and 3” bolting
is for side panels through connectors or feet only.
•Bolting should consist of one 1/2-13 x 5” bolt (Item #7) or 1/2-13 x 3” bolt (Item #6), two 1/2” flat
washers (Item #8), one 1/2” lock washer (Item #9), and one 1/2-13 nut (Item #10).
Figure 7. Typical Bolting Arrangement (3” Bolt Shown)
14. With mounting holes aligned as shown in Figure 8, place four (4) each 5” bolts from back to front in the
lower frame holes only to secure Frame Side Panels to Frame Back Panel and Frame Feet. Refer to
Figure 7 for bolting arrangement.
Figure 8. Connecting Frame Side Panels to Frame Back Panel
Frame Back
Panel
Frame Foot
Frame Side
Panel
5-INCH

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 11 of 33
15. Place four (4) each 3” bolts from front to back in the front portion of lower Frame Side Panel holes to
secure the front Frame Feet as shown in Figure 9. Refer to Figure 7 for bolting arrangement.
Figure 9. Securing Side Panels to Frame Feet
16. Install the Frame Connection Bars (Item #5) as shown in Figure 10 by inserting two (2) bars in the
Frame Back Panel and one (1) bar in the front portion of each Frame Side Panels. Align the bottom
two holes of the bars with top two holes of the frame panels and bolt in place with four (4) total 5” bolts
in the back and four (4) total 3” bolts in the front. Refer to Figure 7 for bolting arrangement.
Figure 10. Installing Frame Connection Bars
5-INCH
3-INCH
3-INCH
Frame Foot
Frame Side Panel

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 12 of 33
17. Next, build the upper frame assembly. Form the upper frame assembly by placing the back and side
frame panels as shown in Figure 11. Verify the cross-bracing strips on each panel are to the outside
of the assembly, and bolt together with four (4) each 5” bolts from back to front in the bottom of the
frame, finger-tight.Refer to Figure 7 for bolting arrangement.
NOTE: These bolts are installed temporarily and will need to be removed and reinstalled in a future step.
IMPORTANT!! The two (2) mounting holes must be oriented as shown in Figure 11 to ensure unit can
accept optional Model 874301S Eye/Face Wash in the future.
Figure 11. Installing Lower Bolts (5-inch) Temporarily to Form Upper Frame Assembly
IMPORTANT!! Ensure the cable tie (shipping float support) is cut and shipping plug is removed from the
6” cover on the top of the tank.Inspect the float and confirm the float is firmly installed on the float valve.
Inspect the inlet piping for any shipping damage and inspect the bulkhead fitting where the float valve is
installed. It is better to address any concerns about the tank before it is on top of the frame
IMPORTANT!! Haws strongly recommends the use of the Haws Model 9084 Cleansing Stick to provide
prolonged (up to 3 years) water treatment for the water in this tank. If this product has been purchased,
install it in the tank now. Instructions for installation located on page 26.
IMPORTANT!!
Two Eye/Face
Wash mounting
holes must be
located here on
the upper frame
assembly!
5-INCH
5-INCH

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 13 of 33
18. Install Tank Breather Vent (Item #19) where the shipping plug was located in the 6” cap as shown in
Figure 12.
Figure 12. Installing Breather Vent (Item #19)
Breather
Vent

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 14 of 33
19. Use a suitable forklift to lift the Tank Assembly (Item #1) over the upper frame assembly as shown in
Figure 13. Carefully align and insert the tank frame legs into the upper frame assembly while carefully
lowering the tank.
Figure 13. Setting Tank Assembly on Upper Frame
WARNING: Never place fingers, hands, or any other body part between upper
frame assembly and Tank/Tank Frame Assembly while installing the unit!
WARNING:
Never place fingers,
hands, or any other
body part between
Tank Assembly and
upper frame assembly
while installing the unit!

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 15 of 33
20. Use the forklift as needed to align bolt holes and install four (4) each 5” bolts from back to front through
Back Frame Panel and Side Frame Panels and four (4) each 3” bolts from front to back of the Frame
Side Panels as shown in Figure 14. Refer to Figure 7 for bolting arrangement.
Figure 14.Bolting the Tank Assembly to the Upper Frame
WARNING: Never place fingers, hands, or any other body part between upper
frame assembly and Tank Assembly while installing the unit!
3-INCH
5-INCH

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21. Use two (2) each 3/8-16 X 1-1/4” bolts (Item #15) to install Steel Strut (Item #14) to the underside of
the two (2) tabs under the Tank Assembly as shown in Figure 15. The 1-1/4” bolting should consist of
one 3/8-16 X 1-1/4” bolt (Item #15), two 3/8” Flat Washers (Item #16), and one 3/8-16 Nut (Item #17).
The open side of the channel should face down. Tighten the two (2) bolts with a torque wrench to 23
ft-lb.
Figure 15. Mounting Steel Strut for Shower Piping (Side Frame Panels Not Shown for Clarity)
3/8 Bolts
Steel
Strut

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22. Install the Shower Piping Assembly (Item #11) from the back of the shower by threading the union nut
on the assembly to the union end on the tank as shown in Figure 16.
Figure 16. Installing the Shower Pipe Mount Steel Strut and Shower Piping Assembly to the Tank Union
Union
Nut

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23. Remove the nut and bolt from the 1-1/2” Strut Pipe Clamp Assembly (Item #18), insert the two (2) clamp
halves onto the Shower Pipe Mount Steel Strut (Item #14) around either side of the shower pipe, and
re-install the clamp bolt and nut as shown in Figure 17. Center the shower approximately, push elbow
closely toward strut and tighten the bolt and nut until the shower pipe is held firmly. (Take care to not
overtighten.)
24. Thread Shower Head (Item #12) onto end of Shower Piping Assembly. See Figure 17.
Figure 17. Strut Pipe Clamp Assembly and Shower Head/Bell
25. Remove the four (4) 5” bolts holding the bottom of the upper frame panels together that were previously
temporarily installed from Step 17. Reference Figure 11.
26. Confirm the lower frame is located as desired for long term installation.
Strut Pipe
Clamp
Shower
Head
Elbow

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27. From the front, use the forklift to lift the Tank Assembly and upper frame assembly over the lower frame
assembly. Carefully set the upper half of the frame on the lower half of the frame over the four (4)
Frame Connection Bars.
Figure 18. Mounting Tank Assembly and Upper Frame to Lower Frame
WARNING: Never place fingers, hands, or any other body part between upper
frame assembly and Tank/Tank Frame Assembly while installing the unit!
WARNING:
Never place fingers,
hands, or any other
body part between
Tank Assembly/upper
frame assembly and
lower frame assembly
while installing the unit!

HAWS®P/N 0510000842 Rev.1 06/18 Model 8740 / 874301S Page 20 of 33
28. Bolt the Tank Assembly and upper frame assembly to the lower frame assembly through the Frame
Connection Bars as shown in Figure 18. Use the forklift as needed to align bolt holes. Replace the
four (4) 5” bolts removed in Step 27 from back to front through the Frame Back Panel and Frame Side
Panels of the upper frame assembly and install four (4) 3” bolts from front to back in the front mounting
holes of the Frame Side Panels. Refer to Figure 7 for bolting arrangement.
IMPORTANT!! Using a torque wrench and 7/8” socket, tighten ALL 1/2-13 frame bolts to 100 ft-lbs.
Figure 18. Bolting Upper Frame Assembly to Frame Connection Bars in Lower Frame Assembly
29. Insert end of Shower Pull Rod (Item #13) through hole in Shower Piping Assembly ball valve handle.
30. Install suitable concrete anchors through mounting holes in Frame Feet per the manufacturer’s
instructions. Customer to determine anchor suitability.
3-INCH 5-INCH