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Rainwater Tank Downpipes & Overflow adjustment

maccifo
Cultivating a Following

Rainwater Tank Downpipes & Overflow adjustment

Good morning!

 

I just moved to a new house and found that the Rainwater tank is leaking water from the downpipes but also the overflow. It appears that has moved slightly over the years causing a minor misalignment (probably 10-15mm at the top). It doesn't look like anything major but I don't want these leaks to contribute further and cause additional erosion next to the slab (which then will make it worse over the years).

 

Problem 1 - Down pipes. They are a bit off as per the picture. Is there any efficient solution to create a flexible pipe towards the tank to avoid further pipe re adjustment on the wall?  I would say they are about 15mm off (tank tilting few degrees off the building line)

 

maccifo_0-1769385596218.png

 

Problem 2 - Overflow. The same tilting has cause the overflow pipe to dislodge. The photo below shows the water scaping under the overflow pipe

 

maccifo_1-1769385892364.png

maccifo_2-1769385976960.png

 

Additionally, is there any good DIY solution to monitor the level of the tank.

 

Regards,

 

Sergio

 

AlanM52
Amassing an Audience

Re: Rainwater Tank Downpipes & Overflow adjustment

Hi @maccifo,

 

Likely PVC cement was used on most of the connections.

Screenshot 2026-01-26 154334.jpg

For that one there should be enough flex so it does engage.

Should you use PVA cement for that?

Personally I never cement any direct water tank connections because down the track I don't want to find myself in a position where I am flame licking around the connection and waiting for the cement to soften.

Screenshot 2026-01-26 161950.jpg

Same thing for that one.

Screenshot 2026-01-26 162105.jpg

For that one.

Screenshot 2026-01-26 154732.jpg

Fittings like that should do the job.

Screenshot 2026-01-26 154846.jpg

In conjunction with that.

 

With regard to tank water level here is what I did and I can't remember the exact details because that was back around 2006.

513077959_10238555703134005_1163025804271686369_n.jpg

 

513225384_10238555700653943_2145319167103951798_n.jpg

T-piece on the tank outlet with adaptor for the ball valve then another adaptor to connect (and this I remember) Pope 13mm x 5m Clear Vinyl Tubing .

The tubing was cut near the top of the tank and secured with a pan head screw directly into the tank.

Looking ahead I figured the tubing would become messed up on the inside and discolored on the outside and that was the case so when needed I to change I simply turned off the water (ball valve handle at 90°) and changed to tubing.

Around that time smart home automation was taking off but I never bothered.

You of course now have many smart options to monitor water level via a phone app.

Come back if you need more info about that.

 

Cheers

 

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