Install Instructions
IS-188A/288A/N388 0914 EDP# 1910218 © 2009 Watts
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.watts.com
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca
Limited Warranty: Watts Regulator Co. (the “Company”) warrants each product to be free from defects in material and
workmanship under normal usage for a period of one year from the date of original shipment. In the event of such defects
within the warranty period, the Company will, at its option, replace or recondition the product without charge.
THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY
WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED. THE
COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach
of warranty, and the Company shall not be responsible for any incidental, special or consequential damages, including
without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not
work properly, other costs resulting from labor charges, delays, vandalism, negligence, fouling caused by foreign material,
damage from adverse water conditions, chemical, or any other circumstances over which the Company has no control.
This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or
alteration of the product.
Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion
or limitation of incidental or consequential damages. Therefore the above limitations may not apply to you. This Limited
Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult
applicable state laws to determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED
WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL
SHIPMENT.
IS-188A/288A/N388
Series 188A, 288A, N388 and
LF188A, LF288A, LFN388
Anti-Siphon Vacuum Breaker
Installation
1. Install 6" (152mm) above
highest point of downstream
piping or hose.
2. No downstream shutoff
valves are allowed.
3. Device can spill water;
install where spillage is not
objectionable.
4. Use only with non-continuous
pressure (pressurized a maximum
of 12 out of 24 hours).
Maintenance
1. Remove hood screws and lift
off hood.
2. Turn off supply pressure and
observe float drop to open air
inlet.
3. If this does not occur or valve has
been constantly discharging
remove bonnet.
4. Replace bonnet (seat) and float.
5. Reassemble (using lubricant
sparingly on bonnet o-ring)
and restore pressure.
6. Retest using steps 1 and 2.
IMPORTANT: Inquire with governing authorities
for local installation requirements.
Typical Installation
6" above highest
downstream piping
No
downstream
shutoff
Watts Ball Valve
Anti-Siphon Vacuum Breaker
Hood
Float
Bonnet
Seat
O-ring
Seat
Disc
Repair Kits
ORDERING CODE KIT NO. SIzES
in. mm.
0887170 RK 188-288-388 T
1
⁄4 -
3
⁄8 8 - 10
0887171 RK 188-288-388 T
1
⁄2 15
0887172 RK 188-288-388 T
3
⁄4 - 1 20 - 25
0887173 RK 188-288-388 T 1
1
⁄4 32
0887174 RK 188-288-388 T 1
1
⁄2 40
0887175 RK 188-288-388 T 2 50
0887176 RK 288A T 2
1
⁄2 - 3 65 - 80
Kit includes: Check disc assembly (disc and disc float), Bonnet O-ring.
ASSE
Standard 1001
Listed by IAPMO
CSA Certified
A Watts Water Technologies Company