Rough-In Guide

Product Information
Applicable product:
Bath with airjets, without flange K-1257-G
Bath with airjets, with integral flange, left drain K-1257-GLF
Bath with airjets, with integral flange, right
drain
K-1257-GRF
Fixture*:
Bathing well:
Basin area, bottom 50″ (127 cm) x 24″ (61 cm)
Basin area, top 65″ (165.1 cm) x 27″ (68.6 cm)
Weight 102 lbs (47.2 kg)
To overflow:
Water depth 14″ (35.6 cm)
Capacity 72 gal (272.5 L)
* Approximate measurements for comparison only.
Included components:
Drop-in cut-out 70″ (177.8 cm) x 34″ (86.4 cm)
Blower
motor:
Heater V Hz A
300 W 120 60 5
Required Electrical Service
Dedicated circuit required, protected with Class A
Ground-Fault Circuit-Interrupter (GFCI):
Blower motor: 120 V, 5 A, 60 Hz
Blower motor is supplied with a 24″ (61 cm) grounding-type
plug-in cord.
Notes
NOTICE: If the blower motor and check valve are relocated, the
following two procedures are required: 1. Provide two access
panels. Locate one access panel at the blower motor/control
location and the other access panel at the control box. 2. Relocate
the blower motor and the check valve together. Do not relocate one
without the other.
Install this product according to the installation guide.
Floor support under product must provide for a minimum of
41 lbs/square foot (199 kg/square meter) loading.
A blower motor access panel is required.
If used, the optional apron must be installed before the finished
floor and wall materials are installed.
If installing a rim-mount faucet, make sure there is no interference
with drain overflow and circulating system before drilling any
holes. Consult local and national codes for minimum air gap
requirements if installing a spout on the faucet deck.
Fixture conforms to ANSI Standard Z124.1.2. All dimensions are
nominal.
1-1/2"
(3.8 cm)
36" (91.4 cm)
72" (182.9 cm)
1" (2.5 cm)
3" (7.6 cm)
1-1/2" OD
2-7/8"
(7.3 cm)
Blower Access
Integral Flange Detail
Drop-In Rim Detail
No change in measurements with drain
shown. (K-7166-AF or K-7166M-AF)
Recommended faucet area.
1-1/4"
(3.2 cm)
1/2"
(1.3 cm) R.
18"
(45.7 cm)
1-13/16"
(4.6 cm)
10-1/4"
(26 cm)
20" (50.8 cm) W x
15" (38.1 cm) H
21-1/4"
(54 cm)
K-1257-GRF
20" (50.8 cm)
K-1257-GRF
K-1257-G
1-1/4"
(3.2 cm)
3-1/2"
(8.9 cm)
18-1/2" (47 cm)
K-1257-G
1040051-1-B 2 Kohler Co.