I have 3 questions relating to this.
I have 5 Hepworth inspection chambers around my small garden. They are all
identical and are 10.5 inches across, metal and have 3 flat head screws
securing them (that have all sized up) My property only has one toilet..
First question, Why are there so many of these all on my property? (Am one of
60 houses on the estate which has 2 build styles, built in the late 1980's)
Second question. What is underneath these inspection chambers?
And third question. Water board and leak specialists could not open them band
where frightened they may bust the lids! So how do you open up stuck solid
screws on these Hepworth lids please.

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for full context, visit http://www.homeownershub.com/uk-diy/...s-1175797-.htm

On 12/6/2016 2:14 PM, Mylor wrote:
I have 3 questions relating to this.
I have 5 Hepworth inspection chambers around my small garden. They are all
identical and are 10.5 inches across, metal and have 3 flat head screws
securing them (that have all sized up) My property only has one
toilet.. First question, Why are there so many of these all on my
property? (Am one of
60 houses on the estate which has 2 build styles, built in the late 1980's)
Second question. What is underneath these inspection chambers?
And third question. Water board and leak specialists could not open
them band
where frightened they may bust the lids! So how do you open up stuck solid
screws on these Hepworth lids please.


I've had the same problem with screws on similar "modern" chambers,
ended up drilling out the head and not bothering to replace, since the
cast lids fit quite snugly on the plastic bodies.

If you manage to get the threaded bits out, I suppose you could replace
them with stainless cap screws (readily available from eBay etc).

On 06/12/2016 14:14, Mylor wrote:
I have 3 questions relating to this.
I have 5 Hepworth inspection chambers around my small garden. They are all
identical and are 10.5 inches across, metal and have 3 flat head screws
securing them (that have all sized up) My property only has one
toilet.. First question, Why are there so many of these all on my
property? (Am one of
60 houses on the estate which has 2 build styles, built in the late 1980's)
Second question. What is underneath these inspection chambers?
And third question. Water board and leak specialists could not open
them band
where frightened they may bust the lids! So how do you open up stuck solid
screws on these Hepworth lids please.


Drill the heads off the screws

On 06/12/16 14:14, Mylor wrote:
I have 3 questions relating to this.
I have 5 Hepworth inspection chambers around my small garden. They are all
identical and are 10.5 inches across, metal and have 3 flat head screws
securing them (that have all sized up) My property only has one
toilet.. First question, Why are there so many of these all on my
property? (Am one of
60 houses on the estate which has 2 build styles, built in the late 1980's)
Second question. What is underneath these inspection chambers?
And third question. Water board and leak specialists could not open
them band
where frightened they may bust the lids! So how do you open up stuck solid
screws on these Hepworth lids please.


Probably rodding points?

Try a little impact - well fitting screwdriver and tap the end with a
hammer whilst applying a turning torque.

On 06/12/2016 14:14, Mylor wrote:
I have 3 questions relating to this.
I have 5 Hepworth inspection chambers around my small garden. They are all
identical and are 10.5 inches across, metal and have 3 flat head screws
securing them (that have all sized up) My property only has one
toilet.. First question, Why are there so many of these all on my
property? (Am one of
60 houses on the estate which has 2 build styles, built in the late 1980's)
Second question. What is underneath these inspection chambers?
And third question. Water board and leak specialists could not open
them band
where frightened they may bust the lids! So how do you open up stuck solid
screws on these Hepworth lids please.

Impact screwdriver.

Mike

Muddymike wrote in
o.uk:

On 06/12/2016 14:14, Mylor wrote:
I have 3 questions relating to this.
I have 5 Hepworth inspection chambers around my small garden. They
are all identical and are 10.5 inches across, metal and have 3 flat
head screws securing them (that have all sized up) My property only
has one toilet.. First question, Why are there so many of these all
on my property? (Am one of
60 houses on the estate which has 2 build styles, built in the late
1980's) Second question. What is underneath these inspection
chambers? And third question. Water board and leak specialists could
not open them band
where frightened they may bust the lids! So how do you open up stuck
solid screws on these Hepworth lids please.

Impact screwdriver.

Mike


Penetrating Oil for a week. My screws are stainless steel, but they go into
cast aluminium.
All are now coated with Coppaslip.

In article 2,
DerbyBorn wrote:
Penetrating Oil for a week. My screws are stainless steel, but they go
into cast aluminium. All are now coated with Coppaslip.

Best I've found - for aluminium engines - is an aerospace gunge.
ScotchClad 776 thread sealer. It totally prevents steel bolts seizing in
ally - even where they go through into the water jacket. And locks them
too against vibration.

--
*Keep honking...I'm reloading.

Dave Plowman London SW
To e-mail, change noise into sound.

On 06/12/2016 14:14, Mylor wrote:
I have 3 questions relating to this.
I have 5 Hepworth inspection chambers around my small garden. They are all
identical and are 10.5 inches across, metal and have 3 flat head screws
securing them (that have all sized up) My property only has one
toilet.. First question, Why are there so many of these all on my
property? (Am one of
60 houses on the estate which has 2 build styles, built in the late 1980's)
Second question. What is underneath these inspection chambers?
And third question. Water board and leak specialists could not open
them band
where frightened they may bust the lids! So how do you open up stuck solid
screws on these Hepworth lids please.



Likely to be surface water inspection chambers - usually installed due
to a 90 degree carnage in direction of pipe run.
Soil chambers are usually 450mm ... to allow easier rodding access.

On Tue, 06 Dec 2016 14:30:37 +0000, Tim Watts wrote:

Try a little impact - well fitting screwdriver and tap the end with a
hammer whilst applying a turning torque.

I solved a similar problem with one of these:

Draper Expert 22322 12-Piece Impact Screwdriver Set

[Nothing else would move the screws.]

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