HDPE vs PVC vs RCP: Choosing Storm Drain Pipe in Houston
By David Ortego, Manager · Reviewed by David Ortego, Manager · Updated October 20, 2026
In the City of Houston, reinforced concrete pipe (RCP) has no listed material restriction for storm sewer in the right-of-way. HDPE is limited to local streets, and HDPE and polypropylene can't be augered or laid multi-barrel. PVC is generally not allowed in City right-of-way. Outside the City, county or MUD rules govern. Source: City of Houston 2026 IDM, Tables 9.3 and 9.4.
Open Monday–Friday, 7 AM–4 PM · Will call available · Quotes within 2–3 days
Quick comparison table
| Material | City spec | Storm sewer in City ROW (Table 9.3) | Diameter in ROW (Table 9.4) | Driveway culverts, open-ditch streets |
|---|---|---|---|---|
| HDPE | 02505 | Local streets only; no augering; no multi-barrel | 24"–48" | Single-family residential only; no multi-barrel |
| PVC | 02506 | Not in City ROW or easements except listed cases; not in PPCA; no augering or jacking | 4" SCH 40 (SFR curb cuts); 4"–12" SCH 40 (SFR ditch outfalls) | Not allowed |
| Polypropylene (PP) | 02510 | No augering; no multi-barrel | 24"–48" | Allowed; no multi-barrel |
| RCP | 02611 | No listed restriction | 24" and larger | Allowed |
| Precast RC box | 02612 | No listed restriction | 3 x 2 ft to 12 x 12 ft | Allowed |
The IDM notes that its standard specifications take precedence over the table, and that private developments follow the Uniform Plumbing Code with City amendments.
Rules change, and every project is different. Confirm the material with your engineer of record before you order.
When to use RCP
RCP is rigid concrete pipe with steel reinforcement, made to ASTM C76. In the City of Houston it has no listed restriction for storm sewer in the right-of-way, so it's the usual choice for thoroughfares, augered crossings and multi-barrel runs. It's heavy, so plan for handling equipment. We supply Class IV RCP from 12" to 72".
When to use HDPE
HDPE is a flexible, lightweight thermoplastic pipe. Inside the City, HDPE storm sewer in the right-of-way is limited to local streets, 24" to 48", with no augering or multi-barrel installations. HDPE driveway culverts are limited to single-family residential. Most of the storm pipe we sell is HDPE. See our HDPE pipe page.
HDPE vs polypropylene (PP)
Both are thermoplastic pipe, but the City treats them as separate specs: HDPE is 02505 and polypropylene is 02510. Both have the same no-augering and no-multi-barrel limits. Unlike HDPE, polypropylene is not limited to local streets in Table 9.3, and the 2026 IDM's revision notes say corrugated polypropylene storm pipe "will be allowed under all roadway classifications and no longer be restricted to local streets." We carry ADS HP Storm, a polypropylene pipe.
When PVC makes sense
Inside the City, PVC storm pipe is mostly limited to private and site work and to the small Schedule 40 single-family cases in Table 9.4. It's not allowed for driveway culverts on open-ditch streets.
For sanitary sewer, PVC SDR 26 and SDR 35 are common gravity sewer pipe. See our pipe spec guide and water & sewer pipe and fittings.
Outside the City: Harris County, ETJ and MUDs
In the City's ETJ, Harris County regulations govern. The Harris County infrastructure regulations call for pipe culverts to meet ASTM C-76 Class III RCP, with an 18-inch minimum for residential and commercial driveway culverts. Those figures come from the edition adopted in June 2015, so check the current regulations for your job. Other counties and MUDs have their own criteria, so check them for your job.
From the yard: which pipe do we supply?
"We do whatever the plans call for."
Your engineer of record still makes the call, but that's the rule of thumb we see on jobs.
What drives cost
We don't publish prices, because the total depends on the job. The main cost drivers are:
- Material and diameter
- Bedding and backfill
- Joints and fittings
- Handling equipment
- Delivery
Send us the job and we'll quote RCP and HDPE side by side.
Get the pipe
D&D Utility Supply supplies:
- HDPE: 4" to 60", mostly single wall; corrugated and pressure on request
- RCP: Class IV, 12" to 72"
- PVC pipe: Schedule 40 and 80, 4" to 20", for storm work
- Polypropylene: ADS HP Storm
- Precast box culverts, headwalls and safety end treatments
All pipe is sold in full joints. We supply the pipe; we don't design it. Your engineer of record and permit decide the material.
We're glad to prepare quotes and takeoffs as a service. Please check the quantities against your plans before you order.
Related products
HDPE vs PVC vs RCP FAQs
Can I use PVC for a driveway culvert in Houston?
Not inside the City of Houston. The 2026 IDM (Table 9.3) does not allow PVC for driveway culverts on open-ditch streets. RCP, precast box and polypropylene are allowed, and HDPE is allowed for single-family residential culverts only.
Is HDPE allowed on major thoroughfares in the City of Houston?
No. The 2026 IDM (Table 9.3) limits HDPE storm sewer in the City right-of-way to local streets, with no augering and no multi-barrel installations.
What is the minimum RCP diameter in City of Houston right-of-way?
24 inches, per the 2026 IDM (Table 9.4).
Does Harris County accept HDPE culverts?
The Harris County infrastructure regulations we reviewed call for pipe culverts to meet ASTM C-76 Class III RCP. Check the current Harris County regulations and your permit before ordering another material.
Do you sell polypropylene storm pipe?
Yes. We carry ADS HP Storm, a polypropylene pipe, plus precast box culverts. All pipe is sold in full joints.
Can you quote RCP and HDPE side by side?
Yes. Call (832) 482-2483 or email your plans to salesrep@ddutilitysupply.com. Quotes come back within 2–3 days at most. We're glad to prepare quotes and takeoffs as a service. Please check the quantities against your plans before you order.
Need both options priced?
D&D Utility Supply · 14630 Blue Ash Dr., Houston, TX 77090 · Monday–Friday, 7 AM–4 PM
Open Monday–Friday, 7 AM–4 PM · Will call available · Quotes within 2–3 days
Sources (checked October 2026): City of Houston 2026 Infrastructure Design Manual, Tables 9.3 and 9.4 · Harris County Regulations for the Approval and Acceptance of Infrastructure.