After 55 years the galvanized pipe has rusted out on our stand pipe and drain. I have been looking at ADS pipe to replace the rusted pipe. Any opinions or recommendations as far as quality or cost for the piping? Standpipe is 16" and the drain is 102".

This information may be posted somewhere on the forum, but sorry I could not find it.

You may not be getting a response because you seem to have listed a merchant (ADS) rather than a type of pipe, and because you have not provided many details of what you are wanting. I am guessing the installation will cost much more than the actual pipe, but I do not have standpipes on my 3 fish ponds. I do have small standpipes on 3 of my wetlands, but your pipes are much larger than those. Seems like you options are to replace what you have or to block it off and add a new system (which might be less costly). A lot of folks here favor siphon systems. I like the simplicity of a straight pipe with a shroud to prevent vortexing, and a sturdy drain guard. I use PVC sewer pipe rather than the less expensive double-wall plastic, but I tend to over-engineer things.

Sorry for lack of details.

ADS is Advanced Drainage Systems and seems to me they manufacturer their own products HDPE- High density Polyethlene. It seems expensive and carries a 100 year guarantee.

I also made a mistake and used inch symbol instead of feet so the downstand is 16 feet high and the drain pipe is 102 feet long. It was constructed 55 years ago and has rusted out. The top of the downstand has dropped 6 feet and our 5 acre pond has dropped the same level. I
intend to replace the whole system because I have read several times that trying to plug old drains is not usually successful.

The present system which we never had any problems with, has a 22" diameter downstand and a 18" drain to outlet. I want to stay close to this ratio of sizes for the new installation. I am digging out the old pipe, cutting a 4'x4' core and installing antiseepage guard around the pipe.

I would like to know if there are suppliers of pipes, plastics, which would have water tight pipes with downstand, 90 elbow, reducer coupling to the smaller drain pipe and anti-seepage guard. I am making my own trash and beaver guard above the top of the downstand.

I am looking for durable yet economic pipe with built-in system for antiseepage guard. Suggestions for brand of pipe and/ or suppliers of pipe for drainage systems in dams.

Can you post some pics so they can get a better idea of what you are trying to describe?

I've heard that they speak a thousand words... :-)

here is a link to the place that i bought my supplies from when i built my last pond. i used a conventional type standpipe, but i added another pipe straight through my dam with a valve on the dry side. the straight thru pipe is only 4". my standpipe is 12 inches down and 10" out if i recall correctly.
https://www.ponddampiping.com/index.html

This is a conventional system. Photos of the site will not be helpful as it is still all under ground. I have not yet begun to dig it the old pipe. I will post a sketch of the project if I can figure out how to post a pic.