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3
Be careful not to strip or cross thread
plastic fittings or check valves. Flex
hose is not recommended. Rigid PVC or
metal pipe is required for a permanent
installation.
5. Place the pump with the 4’ section
of PVC pipe on a solid, level surface
in the sump pit on an elevated
surface.
6. Attach a rubber check valve (sold
separately) to the top of the
discharge pipe. This will allow the
pump or check valve to be
removed easily for servicing.
NOTE: Check valves can be placed
directly in the pump discharge if
desired. However, for ease of
disassembly, it is recommended that
check valves be placed above the sump
as shown in Figure 1.
The remainder of the discharge pipe
installation will vary depending on
individual circumstances. Using sound
plumbing practices, route the
discharge pipe to an exterior wall by
the shortest path. Keep turns to a
minimum because they reduce flow
output of the pump. The pipe that
exits the building structure should be
sloped downward so that water will
not freeze in the pipe.
When installing the separate discharge
pipe, drill through the outside wall
with appropriate drilling equipment.
Seal the hole to prevent water from
entering.
Method 2
If a separate, dedicated discharge is
not possible as in Method 1, the ESP25
pump can be tied in to the AC-
operated pump’s discharge pipe by
installing a “Y” connector. Two check
valves will be required.
1. Locate the ESP25 on a solid, level
surface in the sump pit. Do not
place the pump on a loose or sandy
surface. Small stones or sand may
damage the pump resulting in
potential pump failure.
2. This pump has a 1
1
/
2
” NPT discharge.
If a 1
1
/
4
” discharge pipe is desired,
an adapter (not included) will be
necessary. Smaller diameter piping
will reduce pump flow, rate and
performance.
3. A check valve will be required in the
discharge line of BOTH the Main AC
pump and the ESP25 pump to
prevent recirculation of water into
the sump pit. System will not
function without two check valves.
4. Cut a 4’ section of 1
1
/
4
" or 1
1
/
2
"
diameter rigid PVC pipe. Cement
1
1
/
2
" pipe to a threaded fitting.
Cement 1
1
/
4
" pipe into pipe
coupling. Attach 1
1
/
4
" pipe section
to the ESP25 discharge adapter.
5. Screw on to pump discharge.
Be careful not to strip or cross thread
plastic fittings or check valves. Flex
hose is not recommended. Rigid PVC or
metal pipe is required for a permanent
installation.
6. Place the pump with the 4’ section
of PVC pipe on the sump floor or
on an elevated surface if required.
7. Attach a rubber check valve (sold
separately) to the top of the
discharge pipe. This will allow the
pump or check valve to be removed
easily for servicing.
8. Duplicate the discharge piping
arrangement for the primary AC
pump if the existing discharge line
has to be adjusted to accommodate
a second pump.
9. Glue a 45º elbow to the short pipe
on the ESP25 pump. Glue a “Y”
adapter to the short pipe on the
existing pump, as shown in
illustration for Method 2.
10. Glue a short piece of PVC pipe
between the 45º elbow and the “Y”.
NOTE: Check valves can be placed
directly in the pump discharge if
desired. However, for ease of
disassembly, it is recommended that
check valves be placed above the sump
as shown in Figure 2.
ESP25
www.waynepumps.com
Figure 2 - Method 2
Charger
Floor
Joist
“Y”
Connector
45°
Elbow
Rigid PVC
Pipe
Check
Valve
(See
Step 10)
Battery Box
Check Valve
(See Step 10)
ESP25 Pump
Existing Pump
Installation
(Continued)