HomeMy WebLinkAboutTIC 2017-01-24 Item 2E - Purchase - Stanley Water Hydrant SaverCity of Tukwila
Allan Ekberg, Mayor
Public Works Department - Bob Giberson, Director
INFORMATIONAL MEMORANDUM
TO: Transportation & Infrastructure Committee
FROM: Bob Giberson, Public Works Director
BY: Pat Brodin, Operations Manager
CC: Mayor Ekberg
DATE: January 20, 2017
SUBJECT: Purchase of Water Hydrant Saver
ISSUE
Committee approval of the purchase of a capital equipment item per TMC 3.32.040.
BACKGROUND
The City of Tukwila Municipal Codes requires all unbudgeted capital equipment valued at over
$5,000.00 to be approved by Council Committee. The proposed purchase of a hydrant saver was
not listed in the capital machinery and equipment listing for the 2017 -2018 biennial budget,
therefore it requires Committee approval.
Every year the Water division is required to excavate and
replace fire hydrants that cannot be repaired. In many
instances the repair cannot be accomplished because the
internal valve seat cannot be removed with our current
manually operated removal tool. Average material costs to
excavate and replace a fire hydrant is approximately
$4,000.00. The Stanley Hydrant Saver is a hydraulic impact
wrench that will make hydrant valve seat removal more cost
effective and ergonomically safe for the operator (see video
www.youtube.com /watch ?v= XfPDIrkDN3g).
ANALYSIS
The purchase of the hydrant saver is within the budgeted amount of $8,500.00 for water small tools
and minor equipment.
RECOMMENDATION
Committee approval for the purchase of the Stanley Hydrant Saver in the amount of $6,022.50,
with sales tax included.
Attachment: Stanley Hydrant Saver Brochure
Current method to remove fire hydrant
w:\shared copy only\pat\info memo water hydrant saver 012017.docx
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HYDRANT
SAVER
STANLEY:
Hydraulic Tools
QUICK AND EASY
VALVE SEAT REMOVAL
...WITHOUT EXCAVATION!
Hydrant seat removed in Tess than 5 minutes!
Safe and effective method without reconstruction.
• SIMPLE: Easy to use, turning a once - difficult application into a routine operation
• COST EFFECTIVE: Pays for itself in the cost of replacing 2 -3 hydrants
• ENVIRONMENTALLY FRIENDLY: By extending the life of a hydrant and not
scrapping difficult -to- recycle materials
Volt
NO
HYDRANT
REPLACEMENT
Out -of- service hydrant
restricts fire /rescue service.
Hydrant Replacement Costs:
• Excavation
• Curb, sidewalk
and street repair
• Cost of new hydrant
• Time & Labor
• Other utility obstacles
Hydrant repaired with large
crew to manually remove
valve seat.
Unsafe Methods:
• "Cheater Bars"
• Backhoe
• Truck with chains
Not Effective:
• Bars break
• Not enough torque
• Risk of back injuries
IMPROVED ,re_tt,vd. REMOVING
FIRE HYDRANT i MAIN VALVE
1. Remove four bonnet bolts and
turn operating nut in the open-
ing direction until free of the
stem. Remove bonnet.
2. Remove four bolts in stuffing
box. Lubricate A -24099 Brass
Sleeve. Slide Sleeve over thread-
ed area of stem to protect 0
rings from damage by threads.
Lift stuffing box off carefully.
Remove brass sleeve.
5. Remove lower stem nuts while
stem and valve assembly is still
in seat wrench. Replace dam-
aged or worn parts.
rift
3. en-
gages lugs on seat ring. Screw
seat wrench stem extension on
to hydrant stem until pin en-
gages top of seat wrench. If
non - adjustable type, use operat-
ing nut instead of seat wrench
stem extension.) Shut off water
at the gate valve. Turn wrench
counter - clockwise to unscrew
seat r: ng.
6. Reassemble and use seat
wrench to hold valve assembly
while tightening lower stem nuts
firmly to stem. Put on a new
copper- asbestos gasket. To do
this, place gasket in one side of
groove in seat ring with seam
of gasket facing outward. Work-
ing in both directions with the
thumbs, push the gasket out-
ward and downward until gas-
ket is snugly seated into groove.
40 J
4. Lift stem, complete valve
mechanism, and seat wrench as
a unit from hydrant barrel....
7. Loosen seat wrench extension
(or operating nut) so seat ring
has some float in seat wrench.
Replace complete working parts
and seat wrench assembly in hy-
drant barrel.
6
8. Screw seat ring in place by
turning seat wrench clockwise.
Turn water on at gate valve.
Remove seat wrench.
9. Check stuffing box gasket.
Lubricate A -24099 Brass Sleeve.
Slide Sleeve over threaded area
of stem to protect '0" rings
from damage by threads. Place
stuffing box in position and bolt
to barrel. Remove Brass Sleeve.
Pour Mueller Hydrant Lubricant
into oil reservoir until THREE -
QUARTERS of an inch from top.
10. Replace bonnet. Turn operat-
ing nut in closing direction to en-
gage stem. If bonnet has filler
plug, make sure that the filler
plug hole is aligned with the
offset portion of the oil reser-
voir. Bolt in place.
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