Synergy Reef

ABS Bulkhead Slip x Slip

Bulkheads are used to attach plumbing to aquariums and sumps to allow water to flow through them. These low profile reef safe bulkheads are made from black ABS plastic. Our supplier manufactures these slightly thicker than competitor aquarium bulkheads making them more reliable.

Our Bulkheads come in different sizes That the PVC Pipe will “Slip” into. The PVC Pipe will Slip into the bulkhead to make a connection. Slip fittings will require a solvent to bond the bulkhead to the plumbing permanently.

When measuring for bulkheads, you will need a hole in your tank that is slightly larger than the “C” measurement for the corresponding bulkhead but no larger than the “A” measurement. (see attached image) See bulkhead dimensions below for all the measurements.

Example: If you have a 1.33″ or 35mm diameter hole currently in your tank, then you would want to use the .75″ or 3/4″ ABS Bulkhead.

Bulkhead Dimensions

1/2″ – .25″ ABS Bulkhead Slip X Slip Dimensions (see diagram)
A – 44mm/1.72″
B – 43mm/ 1.69″
C – 27mm/1.06″

Fit's 1/2 inch SCH 40 or SCH 80 PVC pipe
Installation Hole Size – Use a 30mm Diamond Coated Glass Drill Bit for DIY installation

3/4″ – .75″ ABS Bulkhead Slip X Slip Dimensions (see diagram)
A – 52mm/2.04″
B – 50mm/1.98″
C – 34mm/1.33″

Fit's 3/4 inch SCH 40 or SCH 80 PVC pipe
Installation Hole Size – Use our 35mm Diamond Coated Glass Drill Bit for DIY installation

1″ ABS Bulkhead Slip X Slip Dimensions (see diagram)
A – 68mm/2.67″
B – 63mm/2.48″
C – 42mm/1.65″

Fit's 1 inch SCH 40 or SCH 80 PVC pipe
Installation Hole Size – Use a 45mm Diamond Coated Glass Drill Bit for DIY installation

1 1/2″ Short – 1.5″ ABS Bulkhead Slip X Slip Dimensions (see diagram)
A – 86mm/3.38″
B – 73mm/1.99″
C – 59mm/2.32″

Fit's 1 1/2 inch SCH 40 or SCH 80 PVC pipe
Installation Hole Size – Use our 63mm Diamond Coated Glass Drill Bit for DIY installation

1 1/2″ Long – 1.5″ ABS Bulkhead Slip X Slip Dimensions (see diagram)
A – 86mm/3.38″
B – 73mm/2.87″
C – 59mm/2.32″

Fit's 1 1/2 inch SCH 40 or SCH 80 PVC pipe
Installation Hole Size – Use our63mm Diamond Coated Glass Drill Bit for DIY installation

In stock

$6.49 USD

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Size 1/2" SLP x SLP 1" SLP x SLP 3/4" SLP x SLP 1.5" SLP x SLP Short 1.5" SLP x SLP Long

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Let customers speak for us

from 120 reviews

63 mm Hole saw

Worked great nice clean cut!!

Customer

63mm Diamond Hole Saw

12/16/2024

Line Lock

I purchased the double kit for my 75 gallon system. They work great I have used them for years!!

Loc®Line Return

12/13/2024

Great over flow

I installed it on my 75 gallon tank. Works great so quiet once tuned in. Synergy provided get information from drilling holes to installing and adjusting. Super quite great product!!!

16″ Shadow® Overflow V3 2500 GPH

Very impressive

Given its superior quality, customizable color options, and robust functionality, the Synergy Reef sump is highly recommended for a stylish and efficient filtration system.

Shaun Jones

Synergy Reef® SK-44 Clarisea SK5000 & Filter Sock Sump

12/06/2024

For large aquaria this is the only overflow that can handle high gph in a single unit.

Dominic Derome

11/25/2024

Very well crafted unit. High quality overflow

11/21/2024

Great Product

Works flawlessly for my 310gal aquariums. Only need one gate valve to fine tune the sound out of the drain. Quality product. Highly recommend.

SPReefs Seth Pope

10/14/2024

Great ATO container

I am very pleased with my ATO container. It holds a goodly amount of RO water.

STEVEN BENDER

15 Gallon ATO Containers (44-60-72 Series)

Excellent Sump at Fair Price

So I ordered a RM 34 roller mat sump that needed to be cut down to a 32”. It came in about a month and it was shipped extremely well. It took me hour to bag up all the peanuts from packaging. :) It looks amazing and while I have not installed it yet (waiting on tank) I am certain it will perform just fine! My only thought is I wish the acrylic was a little thicker but overall very happy.

Chad Zenzen

Synergy Reef® RM-34 Red Sea ReefMat or Clarisea Sump (Rollermat)

10/10/2024

Quietest overflow system!

I've been using the overflow for over a year now and am really enjoying the very low noise the box is outputting altough I am running a lot of flow through it! Surface skimmer is perfect and cleaning is very easy. Great design!

Steeve Messier

09/16/2024

Good product

Good an consistent construction, easy to assemble. And thr dimensions from the website were accurate.

Jose De La Cruz

09/11/2024

I installed this over flow on my 240 Gallon (2 X 2 X 8) tsunami aquarium. I have it plumbed into my Synergy Reef CL-60. Everything runs great. My only regret is not getting the option to replace the filter socks with a roller mat. I had to cut my CL-60's filter sock section to accept my roller mat.

William Goff

08/30/2024

Very nice unit

Randy Holt

08/29/2024

Socks and silencers

The socks and silencers are great like I expected. Knew I wouldn’t be disappointed since I have had a great experience with my synergy reef sump and overflow. Thanks!

Cory Berry

Synergy Reef Filter Sock Silencers V2

05/22/2024

Sump

this is by far the sexiest thing I have seen. A++++
Will recommend to all my reef friends.

John Hammond

Synergy Reef® CL-34 Aquarium Sump

05/10/2024

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ABS Bulkhead Slip x Slip