Weir FAQs: Pool Skimmer Weir Door Replacement, Slurry Pump Parts and Jobsite Safety

In my role coordinating rush parts orders for Weir, I've handled hundreds of emergency requests over the past decade—mining slurry pumps, hydraulic equipment, pool skimmer weir doors, you name it. This FAQ is the short version of what I tell people on the phone.

What does 'weir' actually mean in different industries?

Basically, there are two weirs. Weir with a capital W is the engineering company—slurry pumps, hydraulic systems, and replacement parts for mining and water management. A lowercase weir is a low dam that controls water flow. It's also the name of the little floating flap inside a pool skimmer.

That's why search results can look messy. If you're after a replacement skimmer weir door, or a concrete weir system, or you just want to check whether Weir Group makes a certain pump, you're in the right spot.

When should I replace my pool skimmer weir door?

The signs are pretty obvious if you know what to look for:

• Water flows past the skimmer instead of into it
• The door is cracked, warped, or won't float
• Debris keeps drifting past the skimmer into the pool
• The skimmer basket stays empty even when the pump is running

In my experience, most weir doors last 3–5 years. A small crack can sometimes be patched, but if the door is warped or the mounting pins are worn, replacement is usually cheaper than fighting suction-side issues all season.

How long does a pool skimmer weir door replacement actually take?

Once you have the right part, installation takes about 10 minutes. You pop out the old door, slide the new one onto the pins, and check that it floats freely. The delay is almost always getting the correct part, not the install itself.

I had a resort pool builder call me on a Friday afternoon in March 2024—36 hours before an inspection. Their weir door had warped enough to let leaves through. We found the exact match, paid $65 for overnight freight on a $28 part, and it arrived the next morning. The alternative was a $12,000 penalty clause for missing the inspection date.

So if you're asking about timing: 10 minutes to install, 1–5 days for shipping depending on where you are. If you're in a real bind, ask for a rush order. Better yet, measure the opening before you call.

Can I get Weir slurry pump parts as a rush order?

Yes, and we do it often. Last quarter alone, I processed 47 rush orders for slurry pump wear parts with 95% on-time delivery. The trick is knowing whether the part is standard or custom. Standard impellers, liners, and seals usually ship within 24–48 hours. Custom metallurgy or hydraulic options still need machining time—no amount of urgency changes that.

Honestly, the hardest part is getting people to call before the pump is completely down. To be fair, some discount vendors are cheaper on standard slow-turnaround parts. But when a pump goes down at a mine, the cost of downtime usually dwarfs the price difference. That's when you start thinking in total cost, not piece price.

What is a weir foundation—and who is Candace King?

A weir foundation is the concrete base that anchors a low-head dam or water-control structure. It has to handle hydrostatic pressure, scour, and seasonal ground movement. A poorly built foundation can undercut and fail within one season, especially in high-velocity flows.

If you landed here searching for "Candace King Weir Foundation"—I'm guessing that's either a person or a charity, not an engineering term. I can't speak to that. The "weir foundation" I deal with is a civil engineering term, and it's not the kind of thing you want to learn about after a failure.

Do I need a forklift license to move pumps and parts?

Probably yes. In the US, OSHA requires formal certification to operate a forklift. If you're moving a 300-pound slurry pump or a pallet of wear liners, a forklift is absolutely the right tool—but only in certified hands.

I once watched an untrained warehouse worker "just move one pallet" without a license. The load tipped sideways. Nobody got hurt, but the pump was scrap. The easiest fix is a 2-hour certification course. Trust me on this one: it pays for itself the first time you avoid a claim.

And if you're asking "how to drive a forklift" because you need one tomorrow, that's a red flag. The answer is training, not a YouTube video. Most employers offer in-house certification; it's a few hours plus a practical test.

Is a squatted truck safe on a jobsite?

No. A squatted truck—the one with the rear lowered and front raised—looks aggressive, but it messes with your center of gravity and braking distance. On a construction site, that's a liability, especially if you're hauling heavy parts or towing equipment.

I get why people like the look. But for work purposes, keep the truck level. If you're hauling pumps or towing a trailer, you want maximum load stability, not style points. In many states it's also illegal, which makes it an easy no for any site manager.

What's the most common mistake people make with weir products?

The "all weir parts are universal" myth. This maybe was true 20 years ago when skimmers and pumps were simpler. Today, brands have different mounting pin spacing, opening widths, and impeller designs. Even within the same skimmer line, a 6-inch and 8-inch opening take different doors.

If I had one piece of advice, it's this: measure the opening, then measure it again. I've eaten $80 in overnight freight because I trusted a photo instead of a tape measure. The photo was right—but it was the wrong angle.

Also, don't ignore small cracks. A tiny crack becomes a big crack the moment the pump starts and the door slams against the skimmer face. Replace it before it fails, especially before inspection season. That's the kind of proactive move that separates a smooth season from a scramble.