- Bulkhead ABS Thread x Thread
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.
Bulkheads come in different sizes and either with or without threads for plumbing to connect to. With threaded bulkheads, you will need to use a male pipe thread to screw 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 image)
Example: If you have a 1.75" diameter hole currently in your tank, then you would want to use the 1" ABS Bulkhead.
1/2" ABS Bulkhead Thread X Thread Dimensions (see diagram)
A - 44mm/1.72"
B - 43mm/ 1.69"
C - 27mm/1.06"
Installation Hole Size - Use our 30mm Diamond Coated Glass Drill Bit for DIY installation
3/4" ABS Bulkhead Thread X Thread Dimensions (see diagram)
A - 52mm/2.04"
B - 50mm/1.98"
C - 34mm/1.33"
Installation Hole Size - Use our 35mm Diamond Coated Glass Drill Bit for DIY installation
1" ABS Bulkhead Thread X Thread Dimensions (see diagram)
A - 68mm/2.67"
B - 63mm/2.48"
C - 42mm/1.65"
Installation Hole Size - Use our 45mm Diamond Coated Glass Drill Bit for DIY installation
1 1/4" ABS Bulkhead Thread X Thread Dimensions (see diagram)
A - 77mm/3.05"
B - 71mm/2.80"
C - 51mm/2.00"
Installation Hole Size - Use our 53mm Diamond Coated Glass Drill Bit for DIY installation
1 1/2" ABS Bulkhead Thread X Thread Dimensions (see diagram)
A - 86mm/3.38"
B - 73mm/2.87"
C - 59mm/2.32"
Installation Hole Size - Use our 60mm Diamond Coated Glass Drill Bit for DIY installation
2" ABS Bulkhead Thread x Thread Dimensions (see diagram)
A - 98mm/3.85"
B - 73mm/2.87"
C - 72mm/2.83"
Installation Hole Size - Use our 75mm Diamond Coated Glass Drill Bit for DIY installation
Leaked By Keith on 8/11/2019Keith wouldn't recommend this product to a friendgot two of these - they both leaked from the threads and I did not overtighten.
Need a head's up. By Ty on 7/2/2018Ty wouldn't recommend this product to a friendAfter final assembly, I have a drip from both bulkheads where elbow and bulkhead screws together. I don't like using chemicals around my fish, but if given a head's up, that this connection would need joint compound, I wouldn't be taking back apart. I only mention this because this was the suggested material list they provided me.
3/4" threads do NOT seal By Kengar on 5/16/2018Kengar wouldn't recommend this product to a friendI am about to send back four of the 3/4" thread x thread bulkheads. I am annoyed at having to do so. When I ordered over the phone, I told the salesperson that I though I had seen someone say something in one of the reviews about threads not matching up properly. I had lost track of the actual comment I saw and didn't call exactly where I saw it. The person at BRS said, Oh, that's just the outer nut that isn't regular thread size they're referring to, not the "main" threads. Well, having received the order and testing the fit against a standard PVC adapter, I find that the fit is NOT correct. Rather, it is loose and totally unsuitable. Back they go.....
The worst By Don on 4/19/2018Don wouldn't recommend this product to a friendThe threads are not the twist as a PVC thread which causes leaks. Save yourself the brain damage and get something else.
Works as expected By Deman on 2/11/2018Deman would recommend this product to a friendIt does exactly what it's supposed, highly recommend it for use with Brute garbage cans...
better build quality By Victoria on 4/21/2016Victoria would recommend this product to a friendUsed a thereaded one with a threaded cap to replace the existing bulkhead that was set up for an external pump on a second hand sump. This worked perfect to patch the hole and shipped free fast
Needs NPT threading By Phil4fish on 9/10/2015Phil4fish would recommend this product to a friendIt seems these bulkheads have just straight threads instead of NPT thread. PVC and barb fitting all use NPT threads so they just don't seal well. Since there isn't much choice in bulkheads, it's the only thing out there, so you kind of have to recommend them by default. The schedule 80 bulkheads look like they'd work, but the hole size is different. If have a choice and are drilling your tank, try the schedule 80 bulkheads instead.
Decent Product By Peter on 5/25/2015Peter would recommend this product to a friendGood product. Just make sure you use a lot of plumbers tape.
Good Bulkhead By Andrew on 5/12/2015Andrew would recommend this product to a friendMake sure to seal the threads on these or they will leak. I used some silicone on mine
Great By Reefermaddness on 4/14/2015Reefermaddness would recommend this product to a friendAmazing bulkhead! It screws and tightens. What more could you want!
using these components in my Aquaponics system By JAMES on 3/15/2015JAMES would recommend this product to a friendI am using these components in my Aquaponics system. All working well so far.
I do wish that the clean up the extraneous plastic seams that are present on the inside and outside the threaded fittings. It means a little more effort when screwing in the fittings.
Cracked Down Seam By Matthew on 3/12/2015Matthew wouldn't recommend this product to a friendHaven't really been able to use this yet but here is what I discovered. I purchase a few bulk heads in various sizes for my new acrylic tank. The holes were already drilled for the abs sized bulkheads so I didn't go SCH80 for the bulkhead.
I fitted all 4 of my bulkheads in my tank and plumbed in all of my plumbing in SCH80. The fit on the 1.5" sizes do not go in but half way on either end. The 1" sizes do fit well, or so I thought. One of my 1" sized bulkheads split down the seam and leaks. So much so I had to drain the 300 gallon tank so I could run to my LFS and get a quick replacement. Luckily they have them in stock.
Looking back on this, my next tank will be using the SCH80 bulkheads. I just don't reccomend this for someone looking to hold back a large amount of water.
Im not sure what kind of bulkheads I need or the difference between them aside from size
A slip fitting is one that you insert a pipe into and then glue. A threaded fitting is one that has threads and is screwed together with another threaded fitting. A pipe wont go into a threaded fitting and vice versa so which bulkhead you get really depends on what type of fitting you plan to connect to it. If for example you want a threaded strainer on one side and a threaded barb connection on the other, a thread x thread bulkhead would be what your looking for.
I am going to drill through glass to install my overflow and return. I was wondering what size hole is adequate for a Quite One PRO 4000 (1022 gph - 5 vertical feet) to over flow into without causing too much constriction when exiting the display. Also should I need two overflow holes or one?
75G display + 20G sump. Do you recommend a different pump? Thank you.
We recommend at least 2 overflow drains coming down with two 1" drain lines. additionally larger drains can work up to 1.5" drain lines. The 4000 pump will work great on that system!
I have an acrylic 55g hexagon tank and the drain is pre-drilled to 3/4". Is this ok, or should I attempt to drill it to 1"? Also, what are the benefits to using sch80 vs. ABS bulkheads?
We would not attempt to drill again if the hole is 3/4" in the acrylic you can use the smaller size bulkhead. Schedule 80 and ABS do not have a difference on most tanks and we recommend ABS as it is a more universal size however Sch. 80 is rated for higher pressures.
For 3/4 and 1 inch bulk head s- 40 what size male fitting go inside this bulk head
If you have a threaded fitting then a 3/4" male threaded and 1" male threaded fitting would go into the 3/4" and 1" bulkheads respectively.
I recently purchased these for an overflow. I also purchased schedule 80 elbows. Is it ok for ABS to be connected to schedule 80 with threads?
Schedule 80 threads will work great with an ABS bulkhead. You will want to ensure that plumbers or Teflon Tape is used to ensure a water proof seal. Feel free to let us know if you have any further questions!
So I have a 3/4 overflow bulkhead from lifeguard aquatics and a 1/2 return, I purchased two 90 degree barb X female threaded pieces from you guys, one is 1/2 in and the other is 3/4 in, but they are too small to fit on the male threads of the bulkheads, should I have got a size up?
You did buy the correct size however the only flaw is that you are attempting to thread onto the outside threads of the bulkhead. Unfortunately nothing threads onto the outside threads of the bulkhead except the nut. All plumbing will be glued or (male threaded) on the inside diameter of the bulkhead. If the inside of your bulkhead is smooth you will need a Spigot x Barb fitting to be glued in (If it is threaded on the inside diameter you can use male NPT x Barb. I have included the links below.