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Each HOG weighs 440lb (200kg) 
when full.  
HOGs must always be installed 
so that the weight is supported 
on a firm surface.
Always ensure that the HOG is 
secure.
The Wall Kit stabilizes the HOG 
laterally and is NOT intended to 
carry any weight. Wall mounted 
HOGs must be installed bearing 
on the ground or another 
stable structure.

PLUMBING

INSTALLATION

WALL KIT

Inlet Screen

90° Ø3½” elbow

(not supplied)

Elbow Vents

(always turned

upward)

Outlet

Connectors

HORIZONTAL

(ON GROUND / UNDER DECKS)

1. Arrange HOGs on a slope of 1 in 100 (1°) 
with the inlet (top) end higher than the 
outlet (bottom) end. You may need to 
provide a thin layer of sand to ensure an 
even bearing surface and to create the 
required fall.
2. Ensure HOGs don’t slip or move when 
full. Use stakes, blocks or bedded sand if 
necessary.
3. Saw top off nub of inlet HOG (see ‘Inlet’). 
Affix 90° Ø3½” elbow (not supplied) with 
plumbers tape over collar of inlet.
4. Attach elbow vents to the top holes, and 
Connectors and Outlet to bottom holes.
5. Attach and direct overflow hose (see 
‘Plumbing’).
6. Place Inlet Screen over inlet opening 
under downspout (see ‘Plumbing’).

VERTICAL 

(ON WALL)

1. Place Wall Channels horizontally at center height of 
35½” (900mm) from base level and fix to wall using 
appropriate fixings (not supplied). Ensure the HOGs 
are sitting on a firm, stable and level surface.
2. Position Spring Nuts 19½” (500mm) apart between 
HOGs and 9 ¾” (250mm) from edge.
3. Saw the top off the inlet HOG nub along the ridged 
line to form a 3½ inch opening. 
4. Attach Elbow Vents to the top holes and attach 
Connectors and Outlet to 
bottom holes.
5. Attach and direct overflow 
hose (see ‘Plumbing’).
6. Place Inlet Screen over 
inlet opening under 
downspout (see Plumbing).
7. Stand HOG in position and 
bolt the Plate through  the 
HOG into the Spring Nut.

WARNING

Inlet HOG

Outlet HOG

Plate

Threaded

Rod

Domed

Nut

Wall Channel

Spring Nut

Wall Channel
Spring Nut

Inlet

Outlet

Stake base if necessary

100

1

www.rainwaterhog.com

Toll Free Number 

1888 700 1096

LOCATING WALL CHANNEL

20”

(508mm) typ

35½”

(900mm )

10”

(254mm)

  Wall Channels located

  in centre of “O”

Spring Nuts

VENTING

INLET

Air

Air

Water

Water

Water

Install Elbow Vents at 
the highest point on 
all HOGs to allow air to 
escape. The Inlet HOG 
is automatically vented 
by the Inlet Screen.

OVERFLOW

For heavy flows, affix 
“T” piece of Ø3½” pipe 
(not supplied) over 
inlet collar with trunk 
to side. Otherwise, 
attach an extra hose 
(not supplied) for any 
overflow water by 
screwing the hose 
fitting into the top 
threaded connector 
point in any of the 
HOGs. Direct the 
overflow as desired  
using the hose.

DOWNPIPE

45°

3” (80mm)

Cut the downpipe on a 45° angle, with 
the lowest point 3” (80mm) above the 
screen to allow leaves to disperse. 
Clean screen out periodically.

Saw the top off the Inlet 
Nub on the Inlet HOG .  
This will form a 3½” raised 
opening.  Take care to saw 
along the indent indicated.  
The Inlet HOG is the HOG 
located below the 
downspout.  Place Inlet 
Screen over the Inlet hole.

saw along

indent guideline

Patent Pending

Inlet Screen

Inlet hole

Elbow Vents

Outlet

Plate

Threaded Rod

Wall Channel

Spring Nut

Domed Nut

Connector

Inlet HOG

Elbow Vent (always

turned upward)

Threaded Brass Insert

Remove plug taking care not to damage the threads.

Connector,

Outlet or 

Overflow

vertical installation

inlet hole

horizontal installation

inlet screen

inlet screen

T section

Top

threaded

connector

HOG

Tap into

existing

gulley

every drop helps

rainwater rescue

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