Bottom Drain with Aerator Ring 110mm

allows for easier sealing than pumping does and allows for more effective waste evacuation.


Under the bung, this model contains an air diffuser with a connection of 1 "F mm.


Suitable for installation on polyester and EPDM seals


Water connection 110 mm: Griffon WDF-05 adhesive to be used for glueing.


Air connection 1 "F: Do not use the original fitting; rather, use our connection set.


A 1 "M threaded connector is included with the bung to attach a flexible hose used to feed air to the air diffuser.


We suggest modifying our collection of PVC pressure fittings, which are stronger and especially more resilient.


As a result, a considerably stronger and safer alternative to a hose for air delivery is a 20 mm PVC pipe.
See our collection under "accessories."


3000 litres per hour per metre of depth is the recommended air flow rate.


ABS drainage: use Griffon WDF-05 compatible ABS adhesive to affix 110 mm PVC pipe.

Is delivery free?

We offer free delivery on the majority of our products over £50. This excludes live fish and bespoke filters. Delivery to UK mainland addresses is £3.95 as standard, or £6.95 for express.

How do I return a product?
Get in touch via email or phone and let us know your problem, we will then help as much as possible. A postage address will be given for you to return the product back to us, and postage will be refunded where applicable to our terms and conditions, which are in line with consumer rights.

At Steel City Koi, we offer a wide range of safe and secure payment options when shopping with us.

Accepted payment methods:

Debit/Credit Cards (Inc American Express)

BACS (for faster dispatch of products) please get in touch for this

Cash upon collection *only for live fish

Pay Later options currently include Klarna and Clearpay