Great Aquariums Start Here
Live Chat Support
    Free Shipping
  • FREE Shipping ON $75+
  • 14-Day Low Price Guarantee
  • Low Price Guarantee
  • Same Day Shipping
  • Same Day Shipping
99% of items we carry qualify for FREE SHIPPING in the contiguous United States if you spend $75 or more. Learn More
If you find a product we sell for a lower price at another online store, we will match their price to ensure you always pay the lowest amount when you shop with us. Learn More
Same Day Shipping
We promise to ship your order as fast as humanly possible. In fact, 99% of orders placed before 2 pm EST ship the same day! Learn More
Home » Saltwater Aquarium Supplies  » CO2 Products  » Accessories  »  MK I Perma-Seal CO2 Outlet Port - 1 Piece
MK I Perma-Seal CO2 Outlet Port - 1 Piece

MK I Perma-Seal CO2 Outlet Port - 1 Piece

Average Rating 4 2
Write A Review
Product Review
We value your opinion & experience
Thank you for taking the time to review our products!

This is a Product Review for: MK I Perma-Seal CO2 Outlet Port - 1 Piece
Name to display on the review:
Location (ex: Anaheim, CA):
Your experience level:
How would you rate this product?
Review Title:
Write your review:
(Please focus on product quality and performance)
This item has been discontinued
Item #:
Notify Me
Just enter your email address below and we'll let you know when the product you are looking for becomes available!

Item Code:
Your Email:
Add to Cart or Notify Me
This item is temporarily unavailable but will be back in stock soon.

Item #
Click the Add To Cart button below if you'd like to reserve this item today. Any other items included in your order will be immediately processed and shipped. We will ship this item separately as soon as it arrives. We will not charge you for this item until it ships and you will incur no additional shipping charges.
Enter your email address in the field below and click the Notify Me button if you'd like us to send you an email when this item becomes available. Although you will be immediately notified when we have stock on hand, we will not reserve any units for you; you must return to our website and place an order.

Add to Wishlist
Select Wish List:
Comments (up to 200 characters):
Quantity Desired:
Quantity Received:
Marine Depot 60-day Returns
At Marine Depot, we stand behind our products. That is why we offer a 60-day return period: one of the best in the industry! Learn More

MK I Perma-Seal CO2 Outlet Port - 1 Piece Information

Perma-Seal Brass

Perma-Seal provides a permanent seal for the connection between your CO2 regulator and cylinder. No more leaks. No more plastic washers.

**Note: Sorry, these will NOT work for the Milwaukee regulator.

**Variations of this product can be found in many online stores. The version we carry is of the highest quality. Although this item is eligible for price matching under our Low Price Guarantee, please be certain the product you want to price match is the same make and model.

MK I Perma-Seal CO2 Outlet Port - 1 Piece Reviews

Average Rating
(2 reviews)
Sort Reviews By:

Long term use

Reviewers Rating Average

Posted: 4/16/2014 from ROCKVILLE, MD UNITED STATES
3.0 5
Experience Level: Expert

Comments: My original MK1 which was between the tank and regulator was found to be coming apart in the center This is why I bought another. Do not over tighten. It was difficult getting the thing out due to the Allen wrench opening flimsy connection with the remaining seal

Did you find this review helpful? Yes No

MK1 Perma seal

Reviewers Rating Excellent!

Posted: 3/1/2012 from STATE COLLEGE, PA UNITED STATE
5.0 5
Experience Level: Intermediate

Comments: I was tired of figuring out Co2 leaks from the system - Airgas CO2 dual regulator and SUMO post-regulator kit, I had opened up the whole thing re did the entire assembly. Not till i exchanged my nylon seals with this perma seal has the CO2 losses disappeared! Now the regulator easily holds pressure and my aquarium is merrily growing plants with 2bps CO2 injection!!! Couldn't me happier You need a small Allen wrench to tighten this thing, BUT DONT TIGHTEN too much or else the seal may get damaged.

1 of 1 People found this review helpful, did you? Yes No

Accessories for MK I Perma-Seal CO2 Outlet Port - 1 Piece

WIN A MEDIA REACTOR! Sign up for hot deals, helpful videos, and a chance to win an Accel Aquatics FR-30 Media Reactor!