Why different forces are needed for 110 mm soil pipe fittings?

[Anode]

Do you know why some 110 mm soil pipe fittings are easy to push into the soil pipe, whilst other fittings are much, much harder to get in, given that they all need to do the same job of making a gas tight and water tight seal?

Recently I found that I could easily push into the soil pipe the end fins of a McAlpine WC-F21R (that’s the flexible connector with the metal Jubilee clip fastening on the opposite end which goes over the toilet spigot). But I could not, as the old man that I am, push the finned end of a McAlpine MAC-EXTA into the soil pipe. The same with a Multikwik MKEA extension pipe, I could not get that into a soil pipe either with my elderly fingers.

Which left me wondering, and hence my question, if they are all making a gas and watertight seal, why is one made much easier than the others? If the fitting that is made easy to get into the soil pipe works all right, why can’t they all be made similarly easy?

This question intrigues me, and if you know the answer I should be very pleased if you would kindly share that answer with me.

Many thanks,
Anode.

 

[SimonG]

Maybe direct at the manufacturer?

My take though is I couldn't give a crap as long as it seals.

 

[Best]

Some fittings are just poorly made.
Use silicone grease on some fittings

 

[SimonG]

Having given this a second thought, drunk albeit, just why?

Strikes me as just another fabricated post.

 

[Best]

Is the weird posts happening again on this forum?
Questions that encourage many answers.

Having given this a second thought, drunk albeit, just why?

Strikes me as just another fabricated post.

 

[SimonG]

Not as weird as the new sponsor one.

 

[rpm]

Is the weird posts happening again on this forum?
Questions that encourage many answers.

Guess some people never learn eh?

 

[SimonG]

Break time methinks.

 

[gmartine]

Slightly different dimensions/tolerances, materials and temperatures.

The space shuttle Challenger disaster would be a good case study.

 

[Pickwickpick]

A silicone based lubricant is your friend in such situations.

 

[richard978]

Underground brown pipe is the worst, Jesus I’ve almost popped my belly button getting some of that stuff apart.

Ground workers must have some muscles.

There is now a tool you can buy for it but it’s about 200 quid so it must be a common complaint . Nerrad tools I believe

 

[WC1]

Never had much of an issue, bit of silicon spray or fairy liquid (I am sure someone will disapprove of fairy liquid) and line it all up good. grippy gloves work a treat, I use these Skytec, - grip good, last well and the neoprene resist fluids like white spirit etc which kills the latex type grippy gloves.

 

[Anode]

Thank you to all those who read my serious query.

I would have liked to do as suggested and ask the manufacturer (McAlpine), but their web page says “We cannot accept installation queries from the general public. Please contact a plumbing professional”, hence my posting here.

For an old person like me it is a serious matter that I can use only some fittings but not all, (even using gloves-a good suggestion). I just wondered if you people in the trade knew anything relevant about why this difference in the insertion force needed.

As has been stated, what matters is whether or not you get a good seal. But I don’t know why some fittings can apparently be designed to work well with a much lower insertion force. If some, why not all, and make life easier? I did wonder if the harder rigidity of some fittings was needed so that they could if needed be displaced by a few degrees when in use, but I don’t know.

My thanks to all who replied.

 

[JTplumbingservices]

Personally I love a tight fit

 

[WC1]

I find I struggle to get it in if I get lube on my hands.