How to join and reduce pvc push pipe to flexible hose

[he11]

Hi everyone,
new to the forum as desperately seeking advice on the sink that has been the bane of my life for several months now!

We live on a boat so it isn't the usual sink set up. The sink waste just joins to a short length of plastic hose that leads to the outside of the boat. I put in a new sink and have been trying to fit the new waste pipe to the existing hose but this has meant using a reducer to go from a 1 1/4" waste to a hose with a 1" male thread fitting (as shown below). However, this meant the sink kept getting blocked after a couple days since the white connector has a very small inside diameter for the sink to flow through.

I have since been recommended to fit a trap but this now presents a new issue. I have a new trap with a 1 1/4" push pipe fitting but I want to connect it to the existing hose (pictured) without trying to force the water through the small diameter of the white connector. I am thinking that I thus probably want to cut the hose to be shorter and somehow connect the push pipe and the hose in a way that will allow the sink to drain properly.

Note ideally I don't want to have to change the hose completely as it is fixed to the outer boat.

Hope you can give some suggestions!

 

[rpm]

Also live on boat, mine is a standard household waste trap with hose and skin fitting and therefore the sink empties in a few seconds and the hose will never block but if you wish not to upsize the hose then something like this.

Sink Waste 1" Angled - Brian Ward, Marine Equipment

Sink Waste 3/4" Angled

www.brianwards.co.uk

 

[he11]

Hi Rpm, thanks for your reply. So the sink I fitted has a standard waste plug fitting and I have bought a standard trap which can screw onto this plug. I ideally want to then connect this to the hose that leads outside.

 

[rpm]

The hose looks to run uphill in the photos and what size is the inside of the smaller hose. What you have at the moment is one of these yes?

1.25" BSP(40mm thread) Male Threaded Pond Hosetail Fitting

The EVE range of hose fitting are made from a tough copolymer polyproplyene that can handle a pressure of up to 8 bar at ambient temperature and a max of 80 degrees C temperature at a lower pressure. -PLEASE CHECK THE THREAD DIAMETER AS BSP THREADS CAN BE CONFUSING -1.25" BSP male thread -...

www.discountleisureproducts.co.uk

1.25" BSP(40mm thread) Female Threaded Pond Hosetail Fitting

The EVE range of hose fitting are made from a tough copolymer polyproplyene that can handle a pressure of up to 8 bar at ambient temperature and a max of 80 degrees C temperature at a lower pressure. -PLEASE CHECK THE THREAD DIAMETER AS BSP THREADS CAN BE CONFUSING -1.25" BSP female thread -...

www.discountleisureproducts.co.uk