Install Instructions

Instruction Sheet
Tank Drainers
402-070
SUPERSEDES: January 1, 1999 EFFECTIVE: June 1, 2007
Plant I.D. 001-1010
OPERATION:
The line of Taco Tank Fittings provide effective air control in hydronic systems. The fittings maintain adequate air cushion to pro-
vide sufficient pressurization against all fluctuations of water volume. Since air can be absorbed in water, the Taco Tank Fitting
maintains collected air within the pressure tank. All free and entrained air collected by an air separator or other air collection device
is routed through the Taco Tank Fitting, allowing air to pass freely into the pressure tank. The fitting also restricts gravity flow of
water between the tank and the system, resulting in lower tank temperature that minimizes reabsorption of air. A unique feature
of the Taco Tank Fitting is a single handle shut-off that readily admits additional air cushion into the pressure tank, if necessary.
INSTALLATION: Model 463, 464, 438
These “all-in-one” drains combine a shutoff valve and tank
drain into one unit. When the handle is turned in tight, the
tank line is open. When the handle is backed out until tight,
the tank line is closed and the drain is open.
HOW TO DRAIN: Model 463, 464, 438
1. Back out handle as far as possible
2. Remove vent plug
3. When tank is empty, replace plug, turn
handle in tight
12.25"
6.0"
AIR TUBE
EXTENSIONS
INCLUDED
WITH MODEL
NO. 463, 464, 438
Z
TANK
DRAIN
PRESSURE
TANK
463 11.44 16.94 23.19 28.69
464 11.44 16.94 23.19 28.69
438 12.81 18.31 24.31 30.06
Model
Standard
Lengths
6" Ext. 12" Ext. 6" & 12" Ext.
Z Dimensions with Extensions
* 2" must be cut from extended tube length on 438 tank fitting with 24" &
30" diameter tanks.
Do it Once. Do it Right.
®
TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: [phone] FAX: [phone].
TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3. Telephone: [phone]. FAX: [phone].
Visit our web site at: http://www.taco-hvac.com
Printed in USA
Copyright 2007
TACO, Inc.
SYSTEM
CONNECTION
1
⁄
2
" NPT
3
⁄
4
" NPT
1" NPT
Size