Dometic 7220 Installation Manual download pdf (Page 11)

Installation

5.4 Outlet plumbing requirements

For sea water ﬂush models:

1. Seacock and outlet sanitation hose (not supplied):

a. 1 in. (25 mm) or 1.5 in. (38 mm) full-ow seacock and exible

hose to route waste to a holding tank with discharge pump,

or route directly overboard. Follow seacock manufacturer’s

instructions.

b. Make sure waste outlet seacock is both aft and higher than

the water inlet seacock.

c Outlet plumbing should have no sharp bends or restrictions.

d. Use two stainless steel hose clamps at each connection.

e. Provide support along entire hose run to limit movement and

side-loading on connections.

f. Keep hose runs as short as possible. Eliminate sags or low

spots that may hinder ow.

2. Discharge hose loop near toilet (not supplied with toilet):

a. To retain water in toilet bowl, make a 12 in. (30 cm) high loop

in discharge line as near to toilet as possible

(gs.

3. Vented loop (not supplied with toilet):

a. Refer to toilet system layout gures

and

–

for

recommended locations of discharge vented loops connect-

ed to system components that are below the water line or

may be less than 8 in. (20 cm) above highest possible water

line at full heel.

b. Vented loops must be positioned a minimum of 8 in. (20 cm)

above highest possible water line at full heel.

5.5 Toilet and ﬂush switch installation

1. Carefully unpack toilet, water supply hose, discharge tting

and hardware (g.

2. Place toilet in desired location on oor. If necessary, rotate

toilet so that macerator pump housing (g.

3) does not

interfere with walls, or so that it will better accommodate the

intended plumbing layout. Conrm adequate clearance is

available for plumbing connections, and also the seat and lid

in raised position. Mark oor where toilet will be installed.

3. (Optional) If macerator pump and base must be positioned at

an angle so that toilet bowl does not face in correct direction,

the upper bowl can be rotated to the proper position:

a. Loosen compression band (

) just enough to slip down

past lower plastic clamp, and remove upper and lower

plastic clamps (

b. Lift bowl. Make sure notch in black rubber gasket sits around shallow pin on toilet base and

remains centered between bowl and base (

). Rotate bowl to desired position, then set it

down on gasket.

c. Re-position plastic clamps and compression band between upper bowl and base. Join

clamps together at front of toilet bowl (there will be a space between the clamps behind the

bowl). With compression band screw positioned on a clamp (not in gap between clamps)

(

), tighten compression band to 65 in.-lbs.

Dometic MasterFlush

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Dometic 7220 Installation Manual Page 11

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