Amtrol SPT-70 Leaflet

DO NOT USE OXYGEN - EXPLOSIVE! Protect 

against freezing temperatures. Never pre-charge 

below 50% of maximum system pressure.

EXPLOSION OR RUPTURE HAZARD. A relief 

valve must be installed to prevent pressure in 

excess of local code requirement or maximum working pressure 

designated in the Product Manual, whichever is less. At least once every 

3 years or if discharge is present, a licensed contractor should inspect the 

temperature and pressure relief valve and replace if corrosion is evident 

or the valve does not function.

1.  Visually inspect the Surge-Trol

®

 for any damage. If damage 

exists return product for replacement.

2.  Remove air cap.

3.  For applications with pump start-up creating water hammer, 

adjust the factory pre-charge setting to 15% below static 

pressure.

4. For applications with surge issues created by pump shut 

down, adjust the factory pre-charge setting to 50% below 

static pressure.

5. For applications with quick closing valves, please consult 

manufacturer for tank location and pre-charge settings. 

 

 

(401) 535-1216.

6.  Replace and tighten cap on air valve.

If adjusting the pre-charge pressure higher 

than 55 PSIG the  unit must be tied to the 

system immediately. Failure to do so could damage the bladder 

and void all warranties.

1.  The Surge-Trol should be installed as close to the offending 

fixture as possible in applications where there are issues with 

a quick closing valve.

2.  The Surge-Trol should be installed as close to the pump as 

possible in surge applications. 

3.  Once the Surge-Trol is installed and the pre-charge adjusted 

properly, check for any leakage. Make repairs if necessary

1.  A qualified professional should check the complete system, 

including the Surge-Trol, yearly and more frequently as the 

system ages.

1.  The Surge-Trol is designed to provide surge protection as well 

as provide a cushion to prevent water hammer depending on 

its application.

2. Water temperature is not to exceed 240°F or fall 

 

below 35°F.

3.  The factory pre-charge setting is 25 PSIG and should only be 

adjusted at the time of the installation.

4.  System velocity shall not exceed 22 fps.

Surge-Trol models: One (1) Year Limited Warranty

© 2014 AMTROL Inc. 

Part #: 9017-140 (01/14)

1400 Division Road, West Warwick, RI  USA 02893  

T: 800.426.8765    F: 800.293.1519

Pump

Check Valve

To System

SURGE-TROL

Tank