Replacing a Telstra Pit Lid? Get the Size Class Right

A mower clips the edge of a footpath pit, or a delivery truck backs over one that was never meant to take that kind of load — and now there's a cracked Telstra pit lid sitting where a working one used to be. The pit body underneath is usually fine. The lid is the part that takes the punishment, and it's the part most contractors end up ordering in a hurry once they realise the old one is beyond patching.

Working out which lid actually fits

The pit itself doesn't come with a label most days you're on site — the only clue is the shape and rough dimensions of what's left. Pit lids are sold by class, and the class needs to match the pit body it's sitting on, not just look like a similar size. A 600mm x 600mm lid rated for one class won't necessarily sit flush or lock correctly on a pit built for another class, even if the outer dimensions look close on a tape measure.

If there's any doubt, the safest approach is checking the broken lid's markings before it goes in the skip, or checking the choosing the right pit size for your job against what's already installed. Guessing from the hole size alone is how a second trip back to site happens.

Pit lid classes at a glance

These are the common concrete pit lid classes stocked for telco and comms pits. The class code is usually the fastest way to confirm you're ordering the right one, once you can see it on the old lid or in the site documentation.

Note the last row — several classes share the same 600mm x 600mm outer footprint. In practice, that's exactly where mix-ups happen, because the lid can look like a straightforward swap when it's actually the wrong class for the pit frame underneath.

Telstra spec vs NBN spec

Pits installed under older Telstra infrastructure and pits installed as part of NBN builds don't always carry identical requirements, even where the physical class matches. Markings, load rating expectations, and sometimes the locking mechanism can differ depending on which network the pit sits on and when it was installed. This matters more on footpath and roadside pits, where load rating isn't just a compliance box to tick — it's what stops the lid failing under vehicle weight.

Common mistakes when replacing a pit lid

Ordering by outer dimensions alone. A 600mm x 600mm lid covers several different classes — matching just the size without checking the class code is how the wrong lid turns up on site.

Assuming Telstra and NBN pits take the same lid. Even where the class looks identical, network-specific compliance requirements can catch out a straight swap.

Not checking the broken lid before it's binned. The class marking is usually the fastest way to confirm what's needed — once the old lid is gone, you're back to measuring and guessing.

Overlooking pit depth as part of the same job. If the pit's being reworked anyway, it's worth confirming the burial depth of what's running into it is still correct before closing it back up.

Frequently Asked Questions

Sizing and Fit

what size is a P5 pit lid?

A P5 lid is one of the 600mm x 600mm classes used on standard comms pits. The class code, not just the outer measurement, is what determines whether it's the correct match for a given pit body.

can I get a lid to suit an existing P300D pit?

Yes — a 300mm x 300mm P300D lid is stocked separately from the larger 600mm classes, since it's a smaller pit footprint typically used for lead-in or junction points.

Compliance and Ordering

do I need council approval to lift a pit lid in the footpath?

In practice, working in or around a footpath or road-reserve pit usually requires the relevant permit or notification to the local council or road authority, separate to any network-owner approval. Check requirements for the specific council area before starting works.

is there a difference between a Telstra pit lid and an NBN one?

There can be, depending on the pit's age and which network installed it — see the compliance note above. A P5 class lid is one of the more commonly requested options for standard comms pits, but confirming the exact spec against the pit owner's requirements is the safer step before ordering.

Shop Telstra Pit Lid at Schnap

Trade pricing and same-day dispatch from Kingsgrove NSW on the full pit lid range.

• 300mm and 400mm lids
• P300D pit lid, 300mm x 300mm -- for smaller lead-in and junction pits
• P4 pit lid, 400mm x 400mm -- mid-size distribution pits

• 600mm lids
• P2 pit lid, 600mm x 600mm
• P3 pit lid, 600mm x 600mm
• P5 pit lid, 600mm x 600mm
• P6/8 pit lid, 600mm x 600mm
• P7 pit lid, 600mm x 600mm

Browse telstra pit lid at Schnap -- trade pricing, trusted brands, dispatched same day from Kingsgrove NSW.