Pentair MT125 Installation And User Manual page 23

NOTICE: Table 5 (page 24) is for installations in which the total lateral vent length (that is, the horizontal distance from the flue
collar to the main vertical portion of the vent) is less than half the total vent height (the vertical distance from the flue collar to the
vent termination) and which have three or less elbows in the system. For vent lengths greater than 16 m (52.5 ft), only one elbow
is allowed. See Table 4 below for details.
Read VERTICAL VENTING on page 22, before using the following table.
Table 4. – Permitted Minimum and Maximum Vent Heights By Size and Heater Model
Double-Wall Vent with Double-Wall Connector in Meters (Feet)
Vent Size
150 mm (6 in.)
200 mm (8 in.)
Double-Wall Vent with Single-Wall Connector in Meters (Feet)
150 mm (6 in.)
200 mm (8 in.)
460906 Rev. D 8/2020
Section 1. Installation Instructions
MT125 - Height min./max.
1.8 m (6 ft.) / 22 m (72 ft.)
1.8 m (6 ft.) / 22 m (72 ft.)
1.8 m (6 ft.) / 4.6 m (15 ft.)
Not Suitable
MASTERTEMP 125 Pool and Spa Heater Installation and User's Guide
23