Install Instructions

ManualsBrandsWatts ManualsHeating Supplies1/2" LF53L Poppet Type Lead Free Pressure Relief Valve (150 psi)

Installation Instructions

Model 53 Pressure Relief Valves

For pressure relief only. Furnished without a lever.

⁄2" female drain. Pressure range

75-175psi (5.17-12.06 bar). Setting 50, 75, 125 and 150psi (3.45, 5.17, 8.61 and 10.34 bar).

Series 530C and LF530C Calibrated Pressure Relief Valves

Calibrated adjustment allows for setting valve to required pressure relief. Adjustable range

50-175psi (3.45-12.06 bar). The Series 530C is ideal for bypass thermal expansion pressure

relief. This valve is not an ASME approved safety relief valve and should not be used in sys-

tem applications with this requirement.

Series 30L Pressure Relief Valves

For pressure relief only. Pressure range 75 to 150psi (5.17-10.34 bar). Not diaphragm actu-

ated. Std. setting 100, 125 and 150psi (6.90, 8.61 and 10.34 bar).

30L-Z1 -

⁄2" 75psi (5.17 bar) - Well system relief valve. Capacity: 20 gpm at 10psi over pres-

sure (85psi).

111/111L -

⁄2" &

⁄4" (15 & 20mm) pressure relief valve only. The 111L is furnished with a

lever. Standard setting is 125psi (6.9 bar), max. temperature 180°F (82°C).

IS-53/530/30L/111

Dielectric Unions

Cold

Water

Heater

Reduced

Pressure

50psi

Cold Supply

Water Pressure

Reducing Valve

Hot

Set Tub

Auxiliary Relief

Valve Can Be

Installed On

Either Hot Or

Cold Piping

*T&P valve should be set according to tank working

pressure or local code requirements.

**Only where code approved. NOTE: Resulting sys-

tem pressure will be as high as bleeder valve setting

(usually 125psi).

**Watts Auxiliary

Thermal Expansion

Pressure Relief

Valve

No. 53, Series

530C, 30L or 111

*Watts T&P

Safety Relief

Valve Set At

150psi

One-Way

Flow Device

No. 30L

No. 111

No. 530C

Purpose

Auxiliary (bleeder) pressure relief valve is set

approximately 25psi (172 kPa) lower than

heater T&P valve and eliminates unneces-

sary and frequent relief from hot water

heater T&P relief valve. This protects the

system from thermal expansion pressure

buildup during times when reducing valve

thermal expansion bypass is ineffective due

to high inlet water pressure. The adjustable

Series 530C is preferred to provide a range

of settings adaptable to any installation.

Some national and regional codes require

maximum static (no-ow) pressure at any

xture to be not more than 80psi (5.5 bar).

Location

Install auxiliary (bleeder) pressure relief

valve downstream of the reducing valve,

in any convenient location where slight

spillage is not objectionable. If spillage is

frequent, install to drain in set tubs or other

drain location.

Auxiliary (Bleeder) Pressure Relief Valve for Thermal Expansion Relief

No. 53

USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.watts.com

Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca

A Watts Water Technologies Company

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.

Model 530C and LF530C Calibrated Pressure

Relief Valve Model 53, 30L and

111 Pressure Relief Valves