3900 Flow Timer and Meter Control Head, mechanical timer dial version with brass body
3900 Flow Timer & Meter Control Head
Can you match this part’s SKU, size and connections to the system label or manual?
- Worth considering for
- Existing system owners who can match a part number and configuration before ordering.
From $3,849.95
Archived USD price · Check today’s price with Crystal Quest.
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A documentation-based review of the manufacturer’s listing and specifications. How we reviewed it
Our assessment
The 3900 Flow Timer & Meter Control Head belongs on a comparison list when its documented application matches your needs. The important next step is to verify the configuration and compatibility, rather than deciding from the product photograph alone.
What the listing gives you
- Configuration choices are documented
Type: Timer, Meter. Interface: Standard / Analog, NXT, NXT 2. Valve: Filter, Softener
- Supporting documents are available
The manufacturer links technical or installation documents. We have kept those references with the product research below.
- Identifiable part numbers
SWP-CV-39XTF, SWP-CV-39XTS, SWP-CV-39XMF and 9 more. These are useful for asking the manufacturer about an exact configuration.
What deserves a closer look
- Fit comes first
A similar photograph or product name does not establish compatibility. Confirm the exact part and its position in your system with Crystal Quest.
- Look beyond the listed price
Keep the original model number and replacement record. Check whether the listing describes one component, a multi-part kit or a complete system.
- Compare the same configuration
The source lists 12 configurations. Use the model and part-number table below so that a size, package or optional component is not mistaken for a different specification.
These are our reading of the published information and our buying considerations. They are not measured performance results.
The specifications, in context.
Values below are published by Crystal Quest. Specifications may describe different configurations; read the model labels and compare the complete source tables in the reference section.
The listing does not provide a separate two-column specification table. Available technical details remain in the full manufacturer reference below; confirm any missing measurements directly with Crystal Quest.
Multi-column comparison tables are preserved in full under Manufacturer reference.
Choose the configuration carefully.
A similar photograph or product name does not establish compatibility. Confirm the exact part and its position in your system with Crystal Quest.
Model & part-number reference 12 configurations
This is a reference table, not an ordering form. SKU and option names are reproduced from the manufacturer snapshot.
| Configuration | Part number / SKU | Listed price (USD) |
|---|---|---|
| Timer / Standard / Analog / Filter | SWP-CV-39XTF | $3,849.95 |
| Timer / Standard / Analog / Softener | SWP-CV-39XTS | $5,049.95 |
| Timer / NXT / Filter | SWP-CV-39XMF | $5,119.95 |
| Timer / NXT / Softener | SWP-CV-39XMS | $5,119.95 |
| Timer / NXT 2 / Filter | SWP-CV-39X2TF | $5,219.95 |
| Timer / NXT 2 / Softener | SWP-CV-39X2TS | $5,219.95 |
| Meter / Standard / Analog / Filter | SWP-CV-39STF | $4,419.95 |
| Meter / Standard / Analog / Softener | SWP-CV-39STS | $7,619.95 |
| Meter / NXT / Filter | SWP-CV-39SMF | $5,119.95 |
| Meter / NXT / Softener | SWP-CV-39SMS | $5,119.95 |
| Meter / NXT 2 / Filter | SWP-CV-39S2MF | $5,219.95 |
| Meter / NXT 2 / Softener | SWP-CV-39S2MS | $5,219.95 |
Price snapshot from November 8, 2026. This is not a current offer or a stock confirmation.
Think beyond day one.
Keep the original model number and replacement record. Check whether the listing describes one component, a multi-part kit or a complete system.
- Match the exact model or SKU before relying on an installation diagram or replacement schedule.
- Ask what the quoted package includes and what must be supplied separately.
- Keep the manufacturer’s operating instructions with your service and replacement records.
Documents & videos
Frequently asked questions
Can you match this part’s SKU, size and connections to the system label or manual?Our reading
The 3900 Flow Timer & Meter Control Head belongs on a comparison list when its documented application matches your needs. The important next step is to verify the configuration and compatibility, rather than deciding from the product photograph alone.
Who is 3900 Flow Timer & Meter Control Head worth considering for?Best fit
Existing system owners who can match a part number and configuration before ordering.
What are the configuration constraints and installation requirements?Fit & plumbing
A similar photograph or product name does not establish compatibility. Confirm the exact part and its position in your system with Crystal Quest.
What are the ongoing maintenance and filter replacement considerations?Ownership costs
Keep the original model number and replacement record. Check whether the listing describes one component, a multi-part kit or a complete system.
Go back to the source.
The full product information below is supplied by Crystal Quest, including its own descriptions and claims. We have reorganized the typography and tables for reading. This material is separate from Elorova’s assessment.
Product overviewManufacturer material
Vtrol V39 Control Valve (3900)
Enhance your water treatment system with the Vtrol V39 Control Valve, developed by Quest Technologies, Inc. This robust and versatile control valve is designed to provide superior performance for both filtration and softening applications. With its advanced timer and metering options, the Vtrol V39 ensures precise control and efficient water management.
Key Features:
- High-Quality Valve Material: Constructed from durable brass and EP/EPDM rubber components to ensure long-lasting performance.
- Versatile Inlet/Outlet Options: Compatible with 3" BSP female connections and 6" tank adapters.
- Adjustable Regeneration: Supports both downflow (DF) and upflow (UF) regeneration with adjustable cycles for optimal performance.
- Advanced Timer Options: Choose from NXT and NXT2 controllers with various timer settings to suit your specific needs.
- Accurate Metering: Offers a range of meter capacities with high accuracy, suitable for different flow rates and volumes.
- User-Friendly Interface: Features an LCD backlit display for easy programming and diagnostics.
- Certified Quality: Complies with multiple international standards, including CE, DM174, and ACS certifications.
- Manual Override: Equipped with manual lever operations for easy maintenance and control.
Typical Applications:
- Industrial and commercial water softeners
- Large-scale filtration systems
Technical specificationsManufacturer material
Valve Specifications:
- Valve Material: Brass
- Rubber Components: EP or EPDM
- Weight (Valve with Controller): 41.0 kg (max)
- Recommended Operating Pressure: 1.8 - 8.6 bar
- Maximum Inlet Pressure: 8.6 bar
- Hydrostatic Test Pressure: 20 bar
- Water Temperature: 1 - 43°C
- Ambient Temperature: 5 - 40°C
- Regeneration Flow: DF or UF
- Bypass of Raw Water During Regeneration: Standard: Yes, NBP version: No
Flow Rates (3.5 bar Inlet - Valve Only - Top Mount):
- Continuous Service Flow (Δp = 1 bar): 57.0 m³/h
- Peak Service Flow (Δp = 1.8 bar): 74.0 m³/h
- CV: 65.0 gpm
- KV: 56.4 m³/h
- Maximum Backwash Flow (Δp = 1.8 bar): 24.0 m³/h
Valve Connections:
- Tank Top Mounted Adapter: 6" flanged or 6" thread
- Side Mount Adapter: 3" BSP female
- Inlet/Outlet: 3" BSP female
- Distributor Pilot: 90 mm [DN80]
- Drain Line: 2" BSP
- Brine Line (1800): 1" NPT male
Electrical Specifications:
- Controller Operating Voltage: 24 VAC for NXT / 24 VDC for NXT2
- Input Supply Frequency: 50 or 60 Hz
- Transformer Output Voltage: 24 VAC for NXT / 24 VDC for NXT2
- Motor Input Voltage Until March 2019: 24 VAC
- Motor Input Voltage April 2019 Onwards: 24 VDC with AC-DC inverter
- Power Consumption: 35 W for 1 powerhead / 60 W for 2 powerheads
- Controller Protection Rating: IP 22
- Valve Protection Rating: IP 44
- Power Supply: 230 VAC for NXT / 100-240 VAC for NXT2, 50/60 Hz, 60 VA, Class II
- Environmental Conditions: Indoor use only, temperature from 5°C to 40°C, maximum relative humidity 80% for temperatures up to 31°C decreasing linearly to 50% relative humidity at 40°C
This product is developed by Quest Technologies, Inc. under the SWP brand and is built to provide reliable and efficient water management solutions for both industrial and commercial applications.
Installation & maintenanceManufacturer material
What this review is based on.
Elorova researched the public Crystal Quest product listing, its published configuration data, source photographs and linked documents. The source page was checked on .
We have not purchased or installed this product, conducted a laboratory evaluation, or independently confirmed the manufacturer’s treatment and certification claims. We do not copy retailer star ratings into an Elorova rating.
Original Crystal Quest product listingOur research is a snapshot. Check the merchant’s current documentation, warranty, configuration, price and delivery terms before deciding. Read our editorial policy.
