What are the Main Differences Between Gravel and Item 4?

What are the main differences between gravel and item 4?

Gravel is suitable for swimming pools- We use gravel for under fiberglass swimming pools, and as backfill surrounding the fiberglass swimming pool. Water will flow through gravel similarly to how it runs through a pipe- If any water leaks under/around your swimming pool- we can easily pump that water out thanks to the gravel's gradation.

Item 4 is perfect as a base for pavers/patio work. The gradation in item 4 allows for a layer of manufactured sand to lay gently on top and leaving no room for the sand to migrate through it. This will ultimately provide a stable patio that will not dip in the future.

Want to learn more about swimming pool construction? Visit our pool school for more info!
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[markg.]

I thought you deserved at least one comment for your learned something today about Gravel and Item #4.

[olddave]

when I worked in a sand and gravel plant 50 years ago, Item 4 was called processed gravel. it was just sandy, stony bank run gravel run thru the crushers with a scoop of sub soil it it to make it pack, , great for drive ways..

[carlpeterson]

Great explanation - lots of useful information for DYIers.

[johnb.]

Excellent job !!!! Thank you for the wisdom truly appreciated .

[bradcarroll]

I have worked with hardscapes, pavers, new septic tanks and field lines, driveways, etc. for over 20 years and I have never heard the term ‘item 4’. I assume it’s because I live in the South. lol. We call it Crusher Run or Crush n Run. I can’t wait to start calling it Item 4 at work just to mess with the guys.

[phillip]

sorry late tot the chat. can you cover what you guys do for a dry well? I loved this vid, im getting a pool put in the backyard soon and you have given me somethings to think about/look for when it goes in!!

[AlMai]

Great video, although it’s already proven that wrapping a pipe with fabric does not work overtime, the fabric gets clogged and water has a hard time entering the pipe. It is suggested to not even have fabric directly covering the pipe, although on the sides and underneath the pipe work great

[MarkDonat]

what’s the difference between item 4 and crusher run? Are they the same thing?

[sergioalfaro]

When layering a gravel driveway do you recommend using gavel first then item 4 over that?

[better_days]

Do you have experience in small one car gravel driveways off the main driveway?

[galecooney]

Wouldnt fabric behind wall eventually fill and block with dirt particles and pressure push wall over...

[child]

I think they need a new name for item 4

[bxx]

How would you layer a gravel fire pit? 3/4 clear base and 5/8 minus top?